21435+5847 BU 690 AB (Garnet star)
21h 43m 30.45s +58° 46' 48.2" P.A. 263.00 sep 19.5 mag 4.27,12.30 Sp M2I+K2II dist. 1818.18 pc (5930.9 l.y.)
| Coord 2000 |
21435+5847 |
|
Discov num |
BU 690 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 43 30.45 +58 46 48.2 |
|
| Date first |
1878 |
|
Date last |
2019 |
|
Obs |
14 |
|
| Pa first |
260 |
|
Pa last |
262.5 |
|
P.A. Now (θ) |
262.5° |
|
| Sep first |
19.3 |
|
Sep last |
19.52 |
|
Sep. Now (ρ) |
19.52" |
|
| Mag pri |
4.27 |
|
Mag sec |
12.30 |
|
delta mag (ΔM) |
8.03 |
|
Spectral class |
M2I+K2II (red/yellow-orange) |
|
| Pri motion ra |
+005 |
|
Sec motion ra |
|
|
| Pri motion dec |
-004 |
|
Sec motion dec |
|
|
| Notes |
N
V
(See Notes, Proper motion indicates physical) |
|
This double is physical.
21435+5847 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Garnet star |
33693 |
21 43 30 +58 46 48 |
BU 690 AB |
2019 |
14 |
263 |
19.5 |
4.27 |
12.30 |
8.03 |
|
<=== |
| Show |
|
33693 |
21 43 30 +58 46 48 |
BU 690 AC |
2019 |
11 |
297 |
42.4 |
4.27 |
12.70 |
8.43 |
|
|
| Show |
|
33693 |
21 43 30 +58 46 48 |
SMR 41 AD |
2019 |
2 |
192 |
62.5 |
4.27 |
13.00 |
8.73 |
|
|
| Show |
|
33693 |
21 43 30 +58 46 48 |
SMR 41 AE |
2019 |
5 |
349 |
45.1 |
4.27 |
13.00 |
8.73 |
|
|
| Show |
|
33693 |
21 43 30 +58 46 48 |
SMR 41 AF |
2019 |
4 |
17 |
75.9 |
4.27 |
13.00 |
8.73 |
|
|
| Show |
|
33693 |
21 43 30 +58 46 48 |
SMR 41 AG |
2019 |
2 |
33 |
107.3 |
4.27 |
11.00 |
6.73 |
|
|
Septuple system
7 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Garnet star |
|
Constellation |
Cepheus |
|
SAO |
33693 |
|
HIP |
107259 |
|
| Tycho2 |
3979-01616-1 |
|
Gaia DR2 |
2202630001591176064 |
|
HD |
206936 |
|
HR |
8316 |
|
| GC |
30440 |
|
ADS |
15271 |
|
BD |
BD+58 2316 |
|
Bayer |
Mu Cephei |
|
| Bayer name |
Mu Cep |
|
Distance |
1818.18 |
|
Distance ly |
5930.9 |
|
Bayer greek |
μ Cep |
|
| Other names |
Erakis, Herschel's Garnet Star, Granatum Sidus |
|
