21390+5729 MIU 2 Aa,Ab
21h 38m 57.61s +57° 29' 20.5" P.A. 196.00 sep 0.1 mag 5.73, Sp O6V+B0:V dist. 787.4 pc (2568.5 l.y.)
Coord 2000 |
21390+5729 |
|
Discov num |
MIU 2 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
21 38 57.61 +57 29 20.5 |
|
Date first |
1992 |
|
Date last |
2018 |
|
Obs |
16 |
|
Pa first |
248 |
|
Pa last |
196.1 |
|
P.A. Now (θ) |
196.1° |
|
Sep first |
0.1 |
|
Sep last |
0.105 |
|
Sep. Now (ρ) |
0.105" |
|
Mag pri |
5.73 |
|
Mag sec |
|
|
delta mag (ΔM) |
|
|
Spectral class |
O6V+B0:V (blue/blue-white) |
|
Pri motion ra |
-003 |
|
Sec motion ra |
|
|
Pri motion dec |
-002 |
|
Sec motion dec |
|
|
Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
21390+5729 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
33626 |
21 38 58 +57 29 20 |
MIU 2 Aa,Ab |
2018 |
16 |
196 |
0.1 |
5.73 |
|
|
|
<=== |
Show |
|
33626 |
21 38 58 +57 29 20 |
BU 1143 AB |
2018 |
9 |
319 |
1.8 |
5.73 |
13.30 |
7.57 |
|
|
Show |
HD 206267 |
33626 |
21 38 58 +57 29 20 |
STF 2816 AC |
2018 |
111 |
120 |
11.8 |
5.73 |
7.48 |
1.75 |
|
|
Show |
|
33626 |
21 38 58 +57 29 20 |
STF 2816 AD |
2018 |
110 |
339 |
20.6 |
5.73 |
7.53 |
1.80 |
|
|
Show |
|
|
21 38 59 +57 29 15 |
GUI 36 CD |
2018 |
81 |
324 |
30.6 |
7.48 |
7.53 |
0.05 |
|
|
Show |
|
|
21 38 57 +57 29 39 |
FLE 3 DE |
2015 |
8 |
351 |
55.2 |
7.53 |
13.19 |
5.66 |
|
|
Sextuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Cepheus |
|
SAO |
33626 |
|
HIP |
106890 |
|
Tycho2 |
3975-01822-1 |
|
Gaia DR2 |
2178396937123250432 |
|
HD |
206267 |
|
HR |
8281 |
|
ADS |
15184 |
|
BD |
BD+56 2617 |
|
Bayer |
Pi 1 Cygni |
|
Bayer name |
Pi1 Cyg |
|
Flamsteed |
80 Cygni |
|
Flamsteed name |
80 Cyg |
|
FK5 |
813 |
|
Distance |
787.4 |
|
Distance ly |
2568.5 |
|
Bayer greek |
π1 Cyg |
|
Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Cyg vs Cep)