17564+1820 MCA 49 Aa,Ab
17h 56m 24.41s +18° 19' 37.1" P.A. 286.00 sep 0.1 mag 7.60,8.40 Sp A0III dist. 240.96 pc (786.01 l.y.)
| Coord 2000 |
17564+1820 |
|
Discov num |
MCA 49 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
17 56 24.41 +18 19 37.1 |
|
| Date first |
1979 |
|
Date last |
2021 |
|
Obs |
24 |
|
| Pa first |
58 |
|
Pa last |
285.8 |
|
P.A. Now (θ) |
285.8° |
|
| Sep first |
0.1 |
|
Sep last |
0.108 |
|
Sep. Now (ρ) |
0.108" |
|
| Mag pri |
7.60 |
|
Mag sec |
8.40 |
|
delta mag (ΔM) |
0.8 |
|
Spectral class |
A0III (white) |
|
| Pri motion ra |
+002 |
|
Sec motion ra |
|
|
| Pri motion dec |
-012 |
|
Sec motion dec |
|
|
| Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
17564+1820 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
103227 |
17 56 24 +18 19 37 |
MCA 49 Aa,Ab |
2021 |
24 |
286 |
0.1 |
7.60 |
8.40 |
0.80 |
|
<=== |
| Show |
HD 163640 |
103227 |
17 56 24 +18 19 38 |
STF 2245 BA |
2021 |
203 |
112 |
2.7 |
7.43 |
7.55 |
0.12 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
SAO |
103227 |
|
HIP |
87823 |
|
Tycho2 |
1557-01939-2 |
|
| Gaia DR2 |
4503405877106880768 |
|
HD |
163640 |
|
BD |
BD+18 3500 |
|
Distance |
240.96 |
|
| Distance ly |
786.01 |
|
