20177+2025 BTG 4 AD
20h 17m 44.53s +20° 25' 23.0" P.A. 170.00 sep 33.8 mag 8.30,13.50 Sp K2
| Coord 2000 |
20177+2025 |
|
Discov num |
BTG 4 |
|
Comp |
AD |
|
Coord arcsec 2000 |
20 17 44.53 +20 25 23.0 |
|
| Date first |
1999 |
|
Date last |
2015 |
|
Obs |
8 |
|
| Pa first |
170 |
|
Pa last |
170.3 |
|
P.A. Now (θ) |
170.3° |
|
| Sep first |
33.8 |
|
Sep last |
33.806 |
|
Sep. Now (ρ) |
33.806" |
|
| Mag pri |
8.30 |
|
Mag sec |
13.50 |
|
delta mag (ΔM) |
5.2 |
|
Spectral class |
K2 (yellow-orange) |
|
| Pri motion ra |
+009 |
|
Sec motion ra |
|
|
| Pri motion dec |
+003 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
20177+2025 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 193079 |
88476 |
20 17 45 +20 25 23 |
COU 219 Aa,Ab |
2013 |
14 |
109 |
0.4 |
8.50 |
9.80 |
1.30 |
|
|
| Show |
|
88476 |
20 17 45 +20 25 23 |
J 2308 AB |
2019 |
11 |
283 |
37.0 |
8.30 |
15.50 |
7.20 |
|
|
| Show |
|
88476 |
20 17 45 +20 25 23 |
J 2308 AC |
2019 |
10 |
284 |
42.5 |
8.30 |
14.00 |
5.70 |
|
|
| Show |
|
88476 |
20 17 45 +20 25 23 |
BTG 4 AD |
2015 |
8 |
170 |
33.8 |
8.30 |
13.50 |
5.20 |
|
<=== |
| Show |
|
88476 |
20 17 45 +20 25 23 |
BTG 4 AE |
2015 |
8 |
267 |
28.9 |
8.30 |
14.20 |
5.90 |
|
|
| Show |
|
|
20 17 42 +20 25 31 |
J 2308 BC |
2019 |
10 |
297 |
5.7 |
15.50 |
14.00 |
1.50 |
|
|
Sextuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Sagitta |
|
SAO |
88476 |
|
Tycho2 |
1639-00122-1 |
|
Gaia DR2 |
1828622703275056512 |
|
| HD |
193079 |
|
