M87...
https://sites.google.com/view/kall-objects/m87
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Update 2023-05-02, GMT 05:35
http://simbad.u-strasbg.fr/simbad/sim-id?Ident=M87&submit=submit+id
Gal coord. (ep=J2000) : 283.77775499474 +74.49115452365
=>
Gal (J2000)
600-system:
472,96292499123 +124,15192420608
In the past (-3447 years)
472,96292499123 - (3447 / 220.000.000 * 360) =
472,95352408214
(
Kommentar:
M87 ligger *udenfor* vores galakse og drejer derfor IKKE med
rundt. Med tiden vil derfor længdegraden blive mindre. Se evt. ...
https://sites.google.com/site/etbible/home/pictures/000-galactic-maps
Breddegraden forbliver den samme hele tiden.
Oplysningen om de 220 millioner år, som en omdrejning tager (in
worst case), er hentet fra webside ...
https://sites.google.com/view/et-background/milky-way/Rotation-period
)
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See also ...
https://da.wikipedia.org/wiki/Messier_87
... M87 er omkring 16,4 megaparsec (53 millioner lysår)
https://en.wikipedia.org/wiki/Messier_87
Right ascension 12h 30m 49.42338s
Declination +12° 23′ 28.0439″
Distance 16.4 ± 0.5 Mpc (53.5 ± 1.6 Mly)
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Messier 87
https://da.wikipedia.org/wiki/Messier_87
Messier 87
https://en.wikipedia.org/wiki/Messier_87
Eq J2000
12h 30m 49.42338s +12° 23′ 28.0439″
Simbad
http://simbad.u-strasbg.fr/simbad/sim-id?Ident=M87&submit=submit+id
ICRS (eq = J2000)
12 30 49,42338230 +12 23 28,0438581
Galactic (360°)
283,77773946036 +74,49115622959
Galactic (600°)
472,9628991006 124,15192704932