15230+3710 SLW 1087 (Eta CrB)
15h 22m 57.53s +37° 10' 24.5" P.A. 218.00 sep 13.1 mag 16.69,18.27 Sp M1.8+M3.1 dist. 17.86 pc (58.26 l.y.)
| Coord 2000 |
15230+3710 |
|
Discov num |
SLW1087 |
|
Comp |
|
|
Coord arcsec 2000 |
15 22 57.53 +37 10 24.5 |
|
| Date first |
1950 |
|
Date last |
2015 |
|
Obs |
12 |
|
| Pa first |
218 |
|
Pa last |
217.5 |
|
P.A. Now (θ) |
217.5° |
|
| Sep first |
13.0 |
|
Sep last |
13.111 |
|
Sep. Now (ρ) |
13.111" |
|
| Mag pri |
16.69 |
|
Mag sec |
18.27 |
|
delta mag (ΔM) |
1.58 |
|
Spectral class |
M1.8+M3.1 (red/red) |
|
| Pri motion ra |
-062 |
|
Sec motion ra |
-062 |
|
| Pri motion dec |
+008 |
|
Sec motion dec |
+005 |
|
| Notes |
V
R
(Proper motion indicates physical, Red magnitudes) |
|
rPM=0.048 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
Eta CrB |
|
Var name |
NSV7054 CrB |
|
Constellation |
Bootes |
|
SAO |
64673 |
|
| HIP |
75312 |
|
Tycho2 |
2563-01366-2 |
|
Gaia DR2 |
1387342644985485440 |
|
HD |
137108 |
|
| HR |
5728 |
|
GC |
20696 |
|
ADS |
9617 |
|
BD |
BD+30 2653 |
|
| Bayer |
Eta Coronae Borealis |
|
Bayer name |
Eta CrB |
|
Flamsteed |
2 Coronae Borealis |
|
Flamsteed name |
2 CrB |
|
| Distance |
17.86 |
|
Distance ly |
58.26 |
|
Bayer greek |
η CrB |
|
Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (CrB vs Boo)
