02537+3820 STF 318 AB,C (20 Per)
02h 53m 42.58s +38° 20' 15.6" P.A. 237.00 sep 13.9 mag 5.39,9.68 Sp F4IV dist. 70.67 pc (230.53 l.y.)
| Coord 2000 |
02537+3820 |
|
Discov num |
STF 318 |
|
Comp |
AB,C |
|
Coord arcsec 2000 |
02 53 42.58 +38 20 15.6 |
|
| Date first |
1782 |
|
Date last |
2021 |
|
Obs |
44 |
|
| Pa first |
240 |
|
Pa last |
236.7 |
|
P.A. Now (θ) |
236.7° |
|
| Sep first |
14.0 |
|
Sep last |
13.912 |
|
Sep. Now (ρ) |
13.912" |
|
| Mag pri |
5.39 |
|
Mag sec |
9.68 |
|
delta mag (ΔM) |
4.29 |
|
Spectral class |
F4IV (yellow-white) |
|
| Pri motion ra |
+050 |
|
Sec motion ra |
+033 |
|
| Pri motion dec |
-078 |
|
Sec motion dec |
-086 |
|
| Notes |
N
V
(See Notes, Proper motion indicates physical) |
|
rPM=0.203 (< 0.3, Physical double)
This double is physical.
02537+3820 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
55975 |
02 53 43 +38 20 16 |
BU 524 AB |
2015 |
225 |
290 |
0.2 |
5.79 |
6.80 |
1.01 |
Y |
|
| Show |
20 Per |
55975 |
02 53 43 +38 20 16 |
STF 318 AB,C |
2021 |
44 |
237 |
13.9 |
5.39 |
9.68 |
4.29 |
|
<=== |
| Show |
|
55975 |
02 53 43 +38 20 16 |
STF 318 AB,D |
2002 |
6 |
40 |
58.1 |
5.39 |
12.60 |
7.21 |
|
|
Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
20 Per |
|
Var name |
NSV977 Per |
|
Constellation |
Perseus |
|
SAO |
55975 |
|
| HIP |
13490 |
|
Tycho2 |
2846-01428-1 |
|
Gaia DR2 |
143119137916819456 |
|
HD |
17904 |
|
| HR |
855 |
|
GC |
3459 |
|
ADS |
2200 |
|
BD |
BD+37 655 |
|
| Flamsteed |
20 Persei |
|
Flamsteed name |
20 Per |
|
Distance |
70.67 |
|
Distance ly |
230.53 |
|
