18457+3942 BU 51 BC
18h 45m 39.17s +39° 40' 45.9" P.A. 297.00 sep 6.0 mag 11.95,12.90
| Coord 2000 |
18457+3942 |
|
Discov num |
BU 51 |
|
Comp |
BC |
|
Coord arcsec 2000 |
18 45 39.17 +39 40 45.9 |
|
| Date first |
1870 |
|
Date last |
2015 |
|
Obs |
17 |
|
| Pa first |
280 |
|
Pa last |
296.7 |
|
P.A. Now (θ) |
296.7° |
|
| Sep first |
2.0 |
|
Sep last |
6.02 |
|
Sep. Now (ρ) |
6.02" |
|
| Mag pri |
11.95 |
|
Mag sec |
12.90 |
|
delta mag (ΔM) |
0.95 |
|
Spectral class |
|
|
| Pri motion ra |
-003 |
|
Sec motion ra |
-016 |
|
| Pri motion dec |
+004 |
|
Sec motion dec |
+006 |
|
| Notes |
|
|
rPM=0.77
Nature of this double is uncertain.
18457+3942 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
18 45 40 +39 41 60 |
BU 51 AB |
2015 |
19 |
185 |
74.2 |
9.00 |
11.95 |
2.95 |
|
|
| Show |
|
|
18 45 39 +39 40 46 |
BU 51 BC |
2015 |
17 |
297 |
6.0 |
11.95 |
12.90 |
0.95 |
|
<=== |
| Show |
|
|
18 45 39 +39 40 46 |
FYM 51 BD |
2015 |
7 |
344 |
34.6 |
11.95 |
15.60 |
3.65 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Lyra |
|
Tycho2 |
3122-01499-1 |
|
Gaia DR2 |
2098229104788232192 |
|
