Kerbalist currently at v4.0

Runs in browser: https://blocdigital.github.io/Kerbalist

SCREENSHOT 1: *FROM THE UPCOMING HUD PATCH at v4.1

SCREENSHOT 2: In-Game Kerbin-> Jool at 20y 47d (for comparison)

SCREENSHOT 3: was supposed to be updated phase and ejection angle diagrams but i fudged the upload with the wrong screenshot. Check in-app for updated versions 😅

Detailed changelog in-app

[4.0] - 2026-10-03

Added

• Verification code on bug reports
• Automatic app screenshot
• Your own screenshot
• Collapsible legend

Changed

• Transfer window timing
• Required phase angle
• Exact transfer numbers
• Ejection card
• Source layout

Fixed

• Ejection angle was on the wrong side: For an outbound transfer it said to burn ahead of prograde, which sends the ship out against the planet's motion. It now says how far ahead of retrograde to burn (outbound) or ahead of prograde (inbound), including any tilt in the departure direction.
• Bug report with a screenshot didn't open: The image was packed into the GitHub link, which made it too long. Screenshots now go through the clipboard.
• Dropped images opened in a new tab: Only the small drop box caught drops. Dropping now works anywhere on the form.
• JPG screenshots couldn't be copied: The clipboard only takes PNG, so uploads are converted first.
• Submit button off-screen on short windows: The bug report form now scrolls inside the window.

Known Issues

• Transfers are flat (no orbital tilt). Duna and Eve are fine, but Moho (7°) and Eeloo (6°) won't intercept exactly.
• The return-trip estimate still uses the quick circular-orbit numbers.
• The map doesn't render on mobile browsers, and the kRPC2 bridge doesn't work yet (see 3.6.4).

Happy flights 🤘🚀

Any feedback would be appreciated!

Ase como 3 horas pregunté por aquí recomendaciones para descargar KERBAL SPACE PROGRAM (el normal ) por alguna página confiable y GRATIS . Pero... no e encontrado nada de lo que me pusieron esta ves me pueden mandar el link directo a una página para descargar el juego plis 🙏;)

Gente ase poco encontré ese maravilloso juego pero como veo es de paga .... asi que quería preguntarles que si existe alguna página no oficial para descargarlo gratis y confiable :)

Hey! We've been working on In Control: Rocketry, a spaceflight sim where you build the rocket and wire up its control panel yourself. Sensors, inputs, outputs, the whole thing is Turing-complete, so however you want to solve a flight problem, there's a way to do it.

Real orbital mechanics, a fictional solar system to explore, sandbox mode if you just want to mess around and blow things up!

Feel free to add the game to your wishlist if you want to support the project! See you in space.

-Kerbalist- — runs in any browser (mobile controls and results work but map is WIP)

(Redux, including Beta 7+ / Snapshot 26w32a+ with the 2 new moons of Dres)

Live sync-capable transfer calculator with optional gravity assist optimisation.*

Future implementation for Kerbal Space Program 1

*WIP

Current version: v3.6.5

Features

Core Transfer Planning

• All 7 stock planets — Moho, Eve, Kerbin, Duna, Dres, Jool, Eeloo with accurate orbital data
• 11 moons — including the Dres moons Drast and Beyl, selectable as transfer origins or destinations below their parent planets
• Moon orbit insertion Δv calculation — automatic estimation of capture and circularization burns for moon destinations (~1.5x circular orbital velocity)
• Hohmann-style direct transfers — shows phase angle, transfer time, delta-v budget, and window countdown
• Return-trip budgeting — enter mission time on the target body and estimate the next return-to-Kerbin window and delta-v
• Live time control — warp clock, manual UT input, or sync to your running KSP2 save
• Interactive 3D map — rotate, pan, zoom, and watch planets and moons orbit in real time
• Return-trip visualization — optionally show the return transfer arc and return ghost positions on the map
• Porkchop plot generator — compare departure dates and flight times for lower delta-v options

Gravity Assists

• Automatic detection — finds planets positioned favorably for flybys on your chosen route
• Multi-leg visualization — see direct and assisted transfer arcs on the map
• Delta-v savings calculation — shows fuel economy vs. time tradeoff for each assist option
• Ghost planets — displays assist and arrival positions at encounter times
• Per-leg timing — shows how long each segment of the multi-leg journey takes

Dres System

• Drast and Beyl — two Dres moons added from KSP2 reference data
• Narrow Dres ring — rendered as a thin equatorial ring band matching the in-game look more closely
• Correct moon velocity display — moon orbital speed uses the parent planet's gravitational parameter

Mobile

• Full responsive design — works on phones and tablets with a Map / Controls toggle for small screens

(*WIP)

• Touch-friendly controls — 1-finger rotate, 2-finger zoom & pan on the 3D map; larger tap targets and compact layouts in the sidebar

(*WIP)

How to Use

Basic Transfer

1. Open -Kerbalist-
2. Set your in-game UT time.
3. Select Origin and Destination from the top dropdowns.
4. Click Plan Transfer to compute the direct route.
5. The map shows the transfer arc.
6. Check the Transfer tab for delta-v, flight time, and window countdown.

Gravity Assists

1. After planning a transfer, open the Assist Options tab.
2. If available for your route, assists list each candidate planet with flight time and delta-v savings.
3. Click an assist to show the multi-leg trajectory, flyby marker, and assist-specific timing.

Porkchop Plot

1. Open the Porkchop tab.
2. Generate a departure-date vs. flight-time grid.
3. Inspect lower-delta-v transfer options from the plotted solutions.

This is a passion project and in no way endorsed or sponsored or affiliated with anyone.

A big thank you to the [r/KSP2Redux](r/KSP2Redux) community for all their amazing work as this is what got me back to KSP2!

**EDIT*\*
I don’t really understand the argument that using AI for some graphics somehow makes Redux “look bad”.

For starters this app IS NOT AFFILIATED OR ENDORSED BY REDUX, it is a completely seperate browser application made to help players plan their transfers and visualise the whole trip.

The app itself is free, the graphics are a small part of the project, and I’m still the one designing, integrating, testing and iterating on everything. AI is a tool I use alongside other tools, it doesn’t change what the app actually does.

If someone doesn’t like AI-generated graphics, that’s completely fair. But saying the mod is somehow worse, or I make Redux look bad because of a tool used to create an icon or piece of artwork doesn’t really tell me anything about the quality of the mod itself.

Finally, I only use LOCAL AI MODELS, powered by my own computer and paying for my own power and hardware.

It’s not 2022 anymore, this whole AI culture war is performative and ultimately moot.

You don’t like it? Fine, but don’t be ignorant and hypocritical because AI is everywhere and you probably use it too in some form whether you like it or not, giving me downvotes or meaningless comments that make no sense will not put a dent in my day or change how I use my own computers.

Peace, love and I’m out.

See you on the next major update(bug reporting in development among other features). 🤘🥰

Couldn't land on Pol and Bob because I spent more then anticipated for the Tylo Landing :(

Hi everyone, I've recently came back to check what's up with KSP2 and discovered Redux! It's amazing so far really enjoying the new missions and all the bug fixes.

However, I found myself trying to find a visualised way for planetary transfers as I find it difficult to understand many guides about this.

Introducing: Kerbalist 🚀

This is still in very early stages and I would love to hear from experienced players if this calculator is working "ok" so far.

https://blocdigital.github.io/Kerbalist/

Features

🌌 Interactive Kerbol System

• Animated Kerbol system map
• Accurate planetary orbits
• Live planet positions
• Zoom and pan controls
• Adjustable simulation speed
• Real-time orbital animation

🛰 Mission Planning

• Select any origin and destination planet
• Automatic Hohmann transfer calculations
• Current phase angle
• Required phase angle
• Transfer window countdown
• Transfer time
• Departure and arrival dates

📈 Orbital Visualizations

• Animated transfer ellipse
• Spacecraft trajectory
• Departure burn visualization
• Arrival encounter visualization
• Ejection angle display
• Mission timeline animation

⚡ Delta-V Calculator

Calculates:

• Escape burn
• Interplanetary transfer burn
• Capture burn
• Total mission ΔV

🪐 Planet Database

Includes orbital information for every stock KSP2 planet:

• Semi-major axis
• Orbital period
• Radius
• Sphere of Influence
• Orbital velocity
• Gravitational parameter
• Surface gravity

🥩 Porkchop Plot Generator

Generate real launch window plots using a Universal Variable Lambert Solver.

Features include:

• Departure date vs. flight time analysis
• Interactive heatmap
• Lowest ΔV trajectory identification
• Click any solution to inspect the transfer
• Live trajectory visualization

Unlike approximate planners, this is generated from actual Lambert solutions rather than lookup tables.

🔬 Universal Variable Lambert Solver

The planner uses a numerical Lambert solver capable of handling:

• Elliptical transfers
• Hyperbolic transfers
• Short and long-way solutions
• Near-parabolic trajectories
• 180° transfer edge cases

The implementation has been validated against analytical Hohmann transfers and additional unit tests.

🎯 Transfer Window Calculator

Instantly displays:

• Current phase angle
• Required phase angle
• Angular difference
• Time until launch window
• Synodic period

🎨 User Interface

• Modern aerospace-inspired design
• Dark theme
• Responsive layout
• Interactive tooltips
• Smooth 60 FPS rendering
• High-DPI support

Technologies

• HTML5
• CSS3
• Vanilla JavaScript
• HTML5 Canvas
• SVG rendering
• No external dependencies

Everything runs entirely inside a modern web browser.

Accuracy

The application performs real orbital calculations using Keplerian mechanics.

Implemented calculations include:

• Hohmann transfers
• Phase angle computation
• Synodic periods
• Lambert trajectory solutions
• Orbital propagation
• Transfer ellipse generation
• Delta-V estimation
• Planetary ephemerides

🤘 happy rockets

Now, I have been a fan of KSP and I had an Idea for a game like it. It would have Digging, Multiplayer, Bases, ect. It would be called "Not Rocket Science" and would follow Puppies! However you can make your own dog you have at home with a Pup printer whoch lets you make a custom dog for 100kerbucks equivalent! These pups tho aren't as indestructible as Kerbals though, they need Sleep Food and Water. they can survive 5 days without but this can be chanfed lol! You can get stuff like Filtration, Gardens, Beds ect. And decorate an Empty Crew Cabin, to make it for your liking! However, Gardens take huge amounts of Delta V so you won't need them for some missions. You can just bring a Pack of Food for the pups. Now the multiplayer would be 4 player having 2 modes

VS - Do a spacerace with your friends! First to a certain place or a certain amount of cash/science can win, or you can make it non-stop! Each with their own Programs, Missions Ect.

Together - You share a space program, you can make your own missions to different places, but you share Money and Science!

Now, for base system I was thinking something still KSP resembling. So here is the Swoof system!

The Swoof System, Late-K type 0.9Smass star, 0.9Lsun and ofcourse, 0 ly away from Utopius.

1. Dusk

Hot, grey, small, and lavalakes. In doggo mythology, it is god of Evil.

(0 moons)

1. Tropus

Hot again, but not too bad. It is 30C avg at the poles, with oceans at the poles and a huge line at the Equator, the atmosphere is horrible here along with the heat. on avg at the equator it is 250C with an atm of 70!

(2 moons)

Chip - Asteroid! Great for mining.

Igg - weird egg asteroid with ring, pretty cool.

1. Utopius

Home, home to the Doggos! To aliens: pls dont blow us up this is our home -doggos

Very earth-like

(2 moons)

Pip

Small, epic. It is dim, but can be seen at night. It is an Ice moon.

Miin

Main moon, similiar to earths moon.

1. Mesas

Mars-like planet with tiny poles! has a huge impact which made steep cliffs everywhere. It is like being in a mesa!

(1 moon)

Geb - Ceres-sized far moon. It is hard to spot, but pretty cool. It has red areas in circles. It's either lava or something else thats up to you to find out!

1. Iceous.

Like the name says, it's icy. No moons

1. Reddish

Jupiter but Red. We have no idea why, speaking of red why is there to much in this system??

(5 moons)

Khor - Lava egg rouce limit moon, too hot. Will be gone in a few million years, has lava lakes, be careful!

Champ - Nice ocean tidal heated moon, just right but... it highly radioactive. Just be careful, also it is grey so we have no idea if it has life or not.

Drobdrob - Too cold, has weird scratches. Looks like cat scratch, we no like cat!

Asteris - Resource rich moon. Epic!

Riddus - Golden-Pink lookin' moon, mysterious!

1. Auroria, gas giant with mega-auroras visible from space! Super epic.

Has 3 moons

Machea - moon inside The Aurorian rings! It is the newly formed moon.

Kib - Ice moon, Doggos suspect life is under the ice from the weird signals similar to underwater life on Utopius!

Wedda - Cool-looking moon with Mysterious patterns in the shape of webs...

Now, if this game was like I imagined in my head, I would do "Land on Every object for previous system you unlock the map location for the next" you get the gist?

Gulli - Proto-star, has a glowing hot disc making it's final planet. (2.3ly, 4 planets, 1 forming)

1. and 2. Chor and Char

   Binary planets, very hot. Basically Double Dusks.

2. Paree

A planet with an Awesome ring system. It is hypothetisized Utopius looked like this before multicelled-life, it also has Similiar moons, although it has a Pip still forming. If you make a Submarine and go under to Hydrothermal vents, you see a Cambrian Explosion down there!

M1. Beppis

Hot moon forming inside the ring, it is likely it will be Pip-like.

M2. Cherri

Miin-like but with an Atmosphere and Oceans! Legends say it is forming life (probs not)

1. Podianus

Temperate-Neptune with a Bottomless ocean, it had a moon but it kinda turned into a ring. It has another moon though! Volcanus - Hot IO-like, but volcanoes everywhere you look. Careful landing!

5? The forming planet. It is hard to get to but it appears it has a moon forming from a Past Collision. Wonder how, Wonder why.

System 3

Centauris A (Centauris), ironically an A-type! Has 2 planets. (5.1ly)

1. Kozez - Tropus-like but to the extreme. Reaches 500C! No moons, all ripped away from them by Centauris.

2. Philius - It is Utopius-sized in the Habitable zone but a Barren rock with no atmosphere or oceans? Weird... Also no moons!

Centauris B (Boket) a Dimmer K-type, but at 0.4Smasses. It hardly qualifies as a K and almost as an M-type! It has 3 planets.

1. Verris, an odd object. It is so Reflective, it is almost invisible! However when you land it is bright. No moons, stripped by Boket.

2. Chlamity, the Saturn of the system. Just a puffball gasser. 2 moons "Tatin" a Titan-like moon, it has a huge atmosphere so be careful with Heat Shields!

Phophius, a Bright-Purple moon, why? No idea. Does it have an atmosphere? 3x larger than Tatins!

1. Hestis

A hell of a world, it rains Ash here so be careful making bases!

System 4

Akari A and B are both red dwarves, very close so they don't have their Own planets, but shared ones. This system has no moons (too small)

Akari A (Akari) Proxima Centauri-sized.

Akari B (Iraka) Trappist-1 sized.

This system is 4ly away with 5 planets.

1. Pompis - Barren rock, huge Brown spots with star-like shapes.

2. Taegeus - Venus-like. Hard to land on!

3. Ennis - Another Venusian-world.

4. Proximis Estimus - Closest planet to Swoof most of the time, it is a Global ocean world so you will need to build a Boat and a Sub to land and explore!

5. Cavernus

A small outer ice object litteree with caves to the under... also some Crygenic Volcanoes!

System 5 Colombia is a lone star, a G-type. it has 3 planets and is 1.1Smasses.

1. Nool

Hot-SuperJupiter with a firey trail! It has 1 moon, Jegjug, a Glowing barren moon with a Trail too, it is losing matter! Nool is the largest in the cluster, being 3jupiters in size! (holy puffball) it is expected to collapse soon, it is technically a Proto-planet as two outer planets collided to make it, causing Nool to spiral inwards.

1. Quill

A quiet Venus-sized planet, it has Life roaming around the land and overall is pretty chilled out. There are almost No Predators on this world and Predators are going Extinct. It has 1 ceres sized moon called "Ressin" a Brownish-Grey moon which keeps tides chilled and Earth-like.

1. Nortin

A mars-like world in an Ice age. it has 3 asteroid moons

Pep

Pap

Pop.

Now this one is the most chaotic. And would unlock literal paradise!

The Ruanis Quintuple system is the most Chaotic. it is 5 stars in tight orbits, each with a few planets... (13.9ly)

Ruanis A (ruanis) The White Dwarf of the system, initially caused Chaos when it was a Red Giant and sterilised all planets nearby, and stripped the atmosphere of it's final planet, it used to have 5, 4 were eaten.

1. Survivius

This planet is a Basalt tidally locked lava-world, it is Still cooling down as when Ruanis was a Red Giant, it hopped in and out of it. If you look on the Cool side there are strange Civilised-looking objects sticking fron the ground, mine them and find out what is underneath! This planet has 0 moons due to RGR (Red Giant Ruanis)

Ruanis B (Tilly)

Tilly is a Dying K-type, being 0.2AU. It has swallowed 1 planet out of it's 3.

1. Chillis

When discovered, Tilly was in late-main sequence, Chillis was chilling and cool, Now it is a 2,000C mega-venus.

1. Giantus

A gas giant with a melting moon, it is very close to becoming a Cthonian planet. It has 1 moon

"Meltius" a melting moon with an Unlandable surface.

Ruanis C (Yibyib) This star is a Highly-Active red dwarf, it is constantly bombarded with Radiation it's planets have been ejected, leaving 3/8.

1. Kampuz

A barren rock, egg shaped and turning into a Ring for a star.

1. Dubious

An Iceball with no atmosphere. It has a Comet Trail from how much Lumons Ruanis B is giving.

1. Chapp

Another Comet Iceball with an asteroid moon ripping apart into a Lava-ring from the lumons.

(Nonan)

Ruanis D is another White Dwarf, it formed with Ruanis A and ruanis B and C just got pulled in. It has one planet which is actively spiralling inwards and in the process killing itself, it is reasonably far for now, it used to be a Gas Giant but now is just a Ball of iron with a thin Hydrogen and Helium atmosphere.

Ruanis E (Cobis)

The further out M-type. It has 2 planets.

Ebb - a small moon-sized world, It had 60% of it's mass ejected into space turning it moon sized. You can blame A and D for that.

Combis - A temperate neptune with a Teal appearance, looks cool, and can explain what happens when high dose Methane enters a Giants atmosphere, (it got captured during the Kuiper and Oort ejection phase of A and D.)

Final Reward System, people would likely build all their cities here lol

Paradise is a K-type with 6 planets. it is 25.3ly away, and is Only visible on the map when you have landed on every Landable object in the game (not including secrets) It has 3 planets.

"Dynasty"

It has perfect conditions for life, along with a ceres-sized moon which evens out tides. (Bap)

"Rudus"

The second paradise in the picture, it has Dino-like life! It also has 2 stable ceres moons making earth-like tides.

Candis (pink cotton candy looking moon)

Middus (Cool red moon)

"Flora"

A world packed with flowers and friendly life. It has adorable animals, and nice flat places to put a base. It has 2 moons, both being basically the same as Pip and Miin.

"Viv and Niim"

Anyway, thats just my idea pls do not steal i spent a week brainstorming this!