[no bug] soleil lever coucher (french) celestia 1.6.0

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symaski62
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Joined: 01.05.2004
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With us: 15 years 3 months
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[no bug] soleil lever coucher (french) celestia 1.6.0

Post #1by symaski62 » 22.10.2009, 08:29

celestia 1.6.0

nord: 50.467
Est: 2.5
alt: 0.05 km

go !
01/01/2010

lever : 7h 57m 26s
coucher : 15h 50m 05s

CustomRotation "earth-p03lp"

-----------------------------------------------------
skychart version 3 BETA

Nord: 50° 28" 00'
Est: 2° 30" 00'
alt : 50 m

01/01/2010
lever : 7h 52m 46s
coucher : 15h 54m 31s


je sais celestia 1.6.0 bug ?
Last edited by symaski62 on 01.01.2010, 21:56, edited 1 time in total.
vista home basic
intel(R) Pentium(R) Dual CPU E2160 @ 1,80GHz 1,79GHz
1Go RAM
NVIDIA GeForce 8400 GS
directX 11
celestia 1.6
with a general handicap of 80% and it makes much d' efforts for the community and s' expimer, thank you d' to be understanding.

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jogad
Posts: 458
Joined: 17.09.2008
With us: 10 years 11 months
Location: Paris France

Re: [bug] soleil lever coucher (french) celestia 1.6.0

Post #2by jogad » 04.12.2009, 12:59

Hello,

symaski62 wrote:je sais celestia 1.6.0 bug ?
Symaski, bonjour
Si tu ne peux pas ?crire en Anglais, il n'est pas interdit de poser directement tes questions dans un Fran?ais compr?hensible plut?t que de faire jouer tout le monde aux devinettes.

If I understand well :idea:, the question is :
Sunrise and sunset times are different in Celestia and in Sky Charts. Where is the bug?

I think there is not reallay a bug, but Celestia is not mainly designed to prepare astronomical observations from Earth.
Thus, atmospheric refraction is not taken into account, which explains the difference.

The Sun's position in Celestia is the real position and not the apparent position.

To calculate sunrise or sunset with Celestia, you should take the moment where the upper edge of the sun (and not the center as you did), is about 35' below the horizon.
In fact, the exact time of sunrise and sunset also depend on temperature and atmospheric pressure.

Topic author
symaski62
Posts: 602
Joined: 01.05.2004
Age: 36
With us: 15 years 3 months
Location: france, divion

Re: [no bug] soleil lever coucher (french) celestia 1.6.0

Post #3by symaski62 » 01.01.2010, 22:06

Image

soleil lever 7h45 UTC ? 16h02 UTC couche

celestia 1.6.0
Longitude 2.34° / Latitude 48.86° PARIS

lever 7h46 UTC ? 16h02 UTC couche

Image
vista home basic
intel(R) Pentium(R) Dual CPU E2160 @ 1,80GHz 1,79GHz
1Go RAM
NVIDIA GeForce 8400 GS
directX 11
celestia 1.6
with a general handicap of 80% and it makes much d' efforts for the community and s' expimer, thank you d' to be understanding.


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