Charon Circumnavigation

[Ian Phillips]

From the coordinates in your screen shot above, 41.4760, 74.0367 to the antipodal point from your starting point, you'll need to follow a bearing of ~ 158.5°

Oooooh thanks

I was driving, but it's gone dark again and I'm hitting too many rocks.

I've moved on a fair bit from there - I'll just get my current position. How do you work that out? I haven't had a chance to puzzle it out yet.

Edit:
I'm at
37.3379
78.3413

 

[Robert Maynard]

For any great circle course other than through a pole or around the equator, the bearing to target varies constantly....

 

[Straha Yeagar]

Oooooh thanks

I was driving, but it's gone dark again and I'm hitting too many rocks.

I've moved on a fair bit from there - I'll just get my current position. How do you work that out? I haven't had a chance to puzzle it out yet.

Edit:
I'm at
37.3379
78.3413

β = atan2(X,Y),

where, X and Y are:

X = cos θb * sin ∆L

Y = cos θa * sin θb – sin θa * cos θb * cos ∆L

and

‘L’ is the longitude,
‘θ’ is the latitude,
‘β‘ is the Bearing.

 

[Ian Phillips]

β = atan2(X,Y),

where, X and Y are:

X = cos θb * sin ∆L

Y = cos θa * sin θb – sin θa * cos θb * cos ∆L

and

‘L’ is the longitude,
‘θ’ is the latitude,
‘β‘ is the Bearing.

Damn. I was hoping for something more along the lines of 'lick your finger and hold it up to the wind'

 

[Straha Yeagar]

For any great circle course other than through a pole or around the equator, the bearing to target varies constantly....

Indeed it does, however since Ian is starting relatively close to a pole, 69° north latitude, that helps reduce the eccentricity or starting at say 45°. In this case, recalculating the bearing every 10° latitude would be sufficiently close I would imagine, as the bearing only changed by about half a degree with a 4° latitude drop.

 

[Straha Yeagar]

Damn. I was hoping for something more along the lines of 'lick your finger and hold it up to the wind'

This would probably work for you as well...

https://www.igismap.com/map-tool/bearing-angle

You will need to periodically recheck your bearing as Robert pointed out, else you will find yourself spiralling and never actually hit the point.

 

[Straha Yeagar]

Just to add a bit more clarity and specificity to the whole bearing thing, once you cross about -45 latitude, it wouldn't hurt to check your bearing more often, but I would think checking it every 7-10 change in latitude should be sufficient, unless you end up going off course to look at neat things.

 

[iain666]

Damn. I was hoping for something more along the lines of 'lick your finger and hold it up to the wind'

If you know where you're headed the compass in ED Discovery will keep you on the great circle to it.

 

[Straha Yeagar]

If you know where you're headed the compass in ED Discovery will keep you on the great circle to it.

Really? Interesting!

 

[Robert Maynard]

My StatusDisplay app can display distance, bearing and estimated time to arrival to a user defined point on a body's surface - in an overlay window that, according to one user at least, works in VR.

Alternatively:

Spoiler

[tr][td]Distance[/td][td]Latitude[/td][td]Longitude[/td][td]Heading[/td][/tr][tr][td]0.00°[/td][td]69.3697°[/td][td]39.1685°[/td][td]125.87°[/td][/tr][tr][td]6.00°[/td][td]65.3904°[/td][td]50.9047°[/td][td]136.72°[/td][/tr][tr][td]12.00°[/td][td]60.7503°[/td][td]59.3389°[/td][td]144.24°[/td][/tr][tr][td]18.00°[/td][td]55.7176°[/td][td]65.5641°[/td][td]149.54°[/td][/tr][tr][td]24.00°[/td][td]50.4430°[/td][td]70.3365°[/td][td]153.36°[/td][/tr][tr][td]30.00°[/td][td]45.0128°[/td][td]74.1374°[/td][td]156.18°[/td][/tr][tr][td]36.00°[/td][td]39.4785°[/td][td]77.2727°[/td][td]158.29°[/td][/tr][tr][td]42.00°[/td][td]33.8725°[/td][td]79.9419°[/td][td]159.89°[/td][/tr][tr][td]48.00°[/td][td]28.2161°[/td][td]82.2798°[/td][td]161.09°[/td][/tr][tr][td]54.00°[/td][td]22.5240°[/td][td]84.3810°[/td][td]162.00°[/td][/tr][tr][td]60.00°[/td][td]16.8068°[/td][td]86.3152°[/td][td]162.65°[/td][/tr][tr][td]66.00°[/td][td]11.0726°[/td][td]88.1356°[/td][td]163.09°[/td][/tr][tr][td]72.00°[/td][td]5.3279°[/td][td]89.8859°[/td][td]163.34°[/td][/tr][tr][td]78.00°[/td][td]-0.4217°[/td][td]91.6036°[/td][td]163.41°[/td][/tr][tr][td]84.00°[/td][td]-6.1709°[/td][td]93.3238°[/td][td]163.31°[/td][/tr][tr][td]90.00°[/td][td]-11.9144°[/td][td]95.0819°[/td][td]163.03°[/td][/tr][tr][td]96.00°[/td][td]-17.6466°[/td][td]96.9161°[/td][td]162.57°[/td][/tr][tr][td]102.00°[/td][td]-23.3607°[/td][td]98.8711°[/td][td]161.88°[/td][/tr][tr][td]108.00°[/td][td]-29.0483°[/td][td]101.0023°[/td][td]160.94°[/td][/tr][tr][td]114.00°[/td][td]-34.6984°[/td][td]103.3821°[/td][td]159.68°[/td][/tr][tr][td]120.00°[/td][td]-40.2954°[/td][td]106.1100°[/td][td]158.02°[/td][/tr][tr][td]126.00°[/td][td]-45.8168°[/td][td]109.3284°[/td][td]155.82°[/td][/tr][tr][td]132.00°[/td][td]-51.2280°[/td][td]113.2494°[/td][td]152.88°[/td][/tr][tr][td]138.00°[/td][td]-56.4736°[/td][td]118.1994°[/td][td]148.87°[/td][/tr][tr][td]144.00°[/td][td]-61.4603°[/td][td]124.6933°[/td][td]143.30°[/td][/tr][tr][td]150.00°[/td][td]-66.0239°[/td][td]133.5362°[/td][td]135.36°[/td][/tr][tr][td]156.00°[/td][td]-69.8733°[/td][td]145.8602°[/td][td]123.93°[/td][/tr][tr][td]162.00°[/td][td]-72.5283°[/td][td]162.6513°[/td][td]108.02°[/td][/tr][tr][td]168.00°[/td][td]-73.4046°[/td][td]-176.9813°[/td][td]88.52°[/td][/tr][tr][td]174.00°[/td][td]-72.2370°[/td][td]-156.9513°[/td][td]69.37°[/td][/tr][tr][td]180.00°[/td][td]-69.3697°[/td][td]-140.8315°[/td][td]54.13°[/td][/tr][tr][td]186.00°[/td][td]-65.3904°[/td][td]-129.0953°[/td][td]43.28°[/td][/tr][tr][td]192.00°[/td][td]-60.7503°[/td][td]-120.6611°[/td][td]35.76°[/td][/tr][tr][td]198.00°[/td][td]-55.7176°[/td][td]-114.4359°[/td][td]30.46°[/td][/tr][tr][td]204.00°[/td][td]-50.4430°[/td][td]-109.6635°[/td][td]26.64°[/td][/tr][tr][td]210.00°[/td][td]-45.0128°[/td][td]-105.8626°[/td][td]23.82°[/td][/tr][tr][td]216.00°[/td][td]-39.4785°[/td][td]-102.7273°[/td][td]21.71°[/td][/tr][tr][td]222.00°[/td][td]-33.8725°[/td][td]-100.0581°[/td][td]20.11°[/td][/tr][tr][td]228.00°[/td][td]-28.2161°[/td][td]-97.7202°[/td][td]18.91°[/td][/tr][tr][td]234.00°[/td][td]-22.5240°[/td][td]-95.6190°[/td][td]18.00°[/td][/tr][tr][td]240.00°[/td][td]-16.8068°[/td][td]-93.6848°[/td][td]17.35°[/td][/tr][tr][td]246.00°[/td][td]-11.0726°[/td][td]-91.8644°[/td][td]16.91°[/td][/tr][tr][td]252.00°[/td][td]-5.3279°[/td][td]-90.1141°[/td][td]16.66°[/td][/tr][tr][td]258.00°[/td][td]0.4217°[/td][td]-88.3964°[/td][td]16.59°[/td][/tr][tr][td]264.00°[/td][td]6.1709°[/td][td]-86.6762°[/td][td]16.69°[/td][/tr][tr][td]270.00°[/td][td]11.9144°[/td][td]-84.9181°[/td][td]16.97°[/td][/tr][tr][td]276.00°[/td][td]17.6466°[/td][td]-83.0839°[/td][td]17.43°[/td][/tr][tr][td]282.00°[/td][td]23.3607°[/td][td]-81.1289°[/td][td]18.12°[/td][/tr][tr][td]288.00°[/td][td]29.0483°[/td][td]-78.9977°[/td][td]19.06°[/td][/tr][tr][td]294.00°[/td][td]34.6984°[/td][td]-76.6179°[/td][td]20.32°[/td][/tr][tr][td]300.00°[/td][td]40.2954°[/td][td]-73.8900°[/td][td]21.98°[/td][/tr][tr][td]306.00°[/td][td]45.8168°[/td][td]-70.6716°[/td][td]24.18°[/td][/tr][tr][td]312.00°[/td][td]51.2280°[/td][td]-66.7506°[/td][td]27.12°[/td][/tr][tr][td]318.00°[/td][td]56.4736°[/td][td]-61.8006°[/td][td]31.13°[/td][/tr][tr][td]324.00°[/td][td]61.4603°[/td][td]-55.3067°[/td][td]36.70°[/td][/tr][tr][td]330.00°[/td][td]66.0239°[/td][td]-46.4638°[/td][td]44.64°[/td][/tr][tr][td]336.00°[/td][td]69.8733°[/td][td]-34.1398°[/td][td]56.07°[/td][/tr][tr][td]342.00°[/td][td]72.5283°[/td][td]-17.3487°[/td][td]71.98°[/td][/tr][tr][td]348.00°[/td][td]73.4046°[/td][td]3.0187°[/td][td]91.48°[/td][/tr][tr][td]354.00°[/td][td]72.2370°[/td][td]23.0487°[/td][td]110.63°[/td][/tr][tr][td]360.00°[/td][td]69.3697°[/td][td]39.1685°[/td][td]125.87°[/td][/tr]​

 

[Rustnsawdust]

If you know where you're headed the compass in ED Discovery will keep you on the great circle to it.

Ooh, cryptic. Where might one find this compass? Can't see anything like it.

 

[Nick Sticks]

Ooh, cryptic. Where might one find this compass? Can't see anything like it.

Click the + to add a new tab.
Scroll down to near the bottom and you will find the Compass.
Add as a new tab or open in a window.

 

[Rustnsawdust]

Thanks, Nick. Never noticed that + (slaps self). Loads of interesting goodies in there.

 

[Nick Sticks]

Thanks, Nick. Never noticed that + (slaps self). Loads of interesting goodies in there.

Yeah, I had it pointed out to me a while ago.

 

[Agony_Aunt]

Met up with our intrepid hero today. Made a recording.

Not very interesting, but we had a little race.

[video=youtube;0vY0B09xayA]https://www.youtube.com/watch?v=0vY0B09xayA[/video]

Fair warning, pretty boring to watch. Also i'd been drinking a ton of rum.

 

[Alec Turner]

Met up with our intrepid hero today. Made a recording.

Not very interesting, but we had a little race.

Fair warning, pretty boring to watch. Also i'd been drinking a ton of rum.

LOL - made me laugh tho!

Ian, just to let you know, I'm gonna bung you a friend request tomorrow probably and I'll come and visit at some point during your journey. And I promise not to put your only SRV in danger by challenging you to a race down a steep, rocky, icy slope!

[haha]

 

[Ian Phillips]

So yes, Agony Aunt dropped by for while. He discovered the joys of skidding sideways on ice and smashing into rocks.

This is him arriving:

Yesterday was my birthday, so I opened a bottle of wine, read messages from my family and friends and generally didn't do much else.
Don't drink and drive folks, You'll end up like Agony Aunt otherwise!

 

[Ian Phillips]

Started off today on a plain and made good speed until I got to a large escarpment range that I had to get across. Some very rough terrain there.

Spot what is wrong with this image:

This might be the end of my journey.

 

[who?]

Surely this is something that needs to be recorded and time-lapsed? "Around the world in 80 seconds"?

 

[Alec Turner]

Started off today on a plain and made good speed until I got to a large escarpment range that I had to get across. Some very rough terrain there.




Spot what is wrong with this image:



This might be the end of my journey.

If you're stuck in a deep ravine try recalling your ship. It may be able to hover close enough to board. If not try to get on its back then use dismiss ship to boost your SRV up out of the ravine.

Surely this is something that needs to be recorded and time-lapsed? "Around the world in 80 seconds"?

I've thought about this in the past but it's hours and hours of video. Tricky.