20531+2909 STT 417 AB (HD 198977)
20h 53m 04.23s +29° 08' 43.7" P.A. 27.00 sep 0.9 mag 8.24,8.42 Sp A0 dist. 204.92 pc (668.45 l.y.)
| Coord 2000 |
20531+2909 |
|
Discov num |
STT 417 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 53 04.23 +29 08 43.7 |
|
| Date first |
1847 |
|
Date last |
2018 |
|
Obs |
88 |
|
| Pa first |
30 |
|
Pa last |
27 |
|
P.A. Now (θ) |
27° |
|
| Sep first |
0.5 |
|
Sep last |
0.897 |
|
Sep. Now (ρ) |
0.897" |
|
| Mag pri |
8.24 |
|
Mag sec |
8.42 |
|
delta mag (ΔM) |
0.18 |
|
Spectral class |
A0 (white) |
|
| Pri motion ra |
+011 |
|
Sec motion ra |
+011 |
|
| Pri motion dec |
-002 |
|
Sec motion dec |
-002 |
|
| Notes |
|
|
Nature of this double is uncertain.
20531+2909 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 198977 |
89240 |
20 53 04 +29 08 44 |
STT 417 AB |
2018 |
88 |
27 |
0.9 |
8.24 |
8.42 |
0.18 |
|
<=== |
| Show |
|
89240 |
20 53 04 +29 08 44 |
STT 417 AB,C |
2014 |
27 |
108 |
30.8 |
8.24 |
10.50 |
2.26 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 198977 |
|
Constellation |
Vulpecula |
|
SAO |
89240 |
|
HIP |
103074 |
|
| Tycho2 |
2183-00600-1 |
|
Gaia DR2 |
1858371777068435200 |
|
HD |
198977 |
|
BD |
BD+28 3916 |
|
| Distance |
204.92 |
|
Distance ly |
668.45 |
|
