18517+4323 BU 421 AB,C
18h 51m 44.38s +43° 23' 29.8" P.A. 226.00 sep 43.1 mag 9.80,9.61 Sp F8
| Coord 2000 |
18517+4323 |
|
Discov num |
BU 421 |
|
Comp |
AB,C |
|
Coord arcsec 2000 |
18 51 44.38 +43 23 29.8 |
|
| Date first |
1893 |
|
Date last |
2017 |
|
Obs |
16 |
|
| Pa first |
231 |
|
Pa last |
226.2 |
|
P.A. Now (θ) |
226.2° |
|
| Sep first |
39.1 |
|
Sep last |
43.116 |
|
Sep. Now (ρ) |
43.116" |
|
| Mag pri |
9.80 |
|
Mag sec |
9.61 |
|
delta mag (ΔM) |
0.19 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
+011 |
|
Sec motion ra |
+003 |
|
| Pri motion dec |
+048 |
|
Sec motion dec |
+010 |
|
| Notes |
|
|
rPM=0.789
Nature of this double is uncertain.
18517+4323 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
18 51 44 +43 23 30 |
BU 421 AB |
2017 |
23 |
296 |
1.2 |
9.80 |
9.89 |
0.09 |
|
|
| Show |
|
|
18 51 44 +43 23 30 |
BU 421 AB,C |
2017 |
16 |
226 |
43.1 |
9.80 |
9.61 |
0.19 |
|
<=== |
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Lyra |
|
Tycho2 |
3131-00575-1 |
|
Gaia DR2 |
2105198737195247616 |
|
ADS |
11775 |
|
