22553-4828 I 22 AB,CD (Tau2 Gru)
22h 55m 16.15s -48° 27' 56.6" P.A. 181.00 sep 93.9 mag 7.14,6.71 Sp F5V dist. 47.69 pc (155.56 l.y.)
| Coord 2000 |
22553-4828 |
|
Discov num |
I 22 |
|
Comp |
AB,CD |
|
Coord arcsec 2000 |
22 55 16.15 -48 27 56.6 |
|
| Date first |
1905 |
|
Date last |
2017 |
|
Obs |
25 |
|
| Pa first |
181 |
|
Pa last |
180.8 |
|
P.A. Now (θ) |
180.8° |
|
| Sep first |
93.2 |
|
Sep last |
93.88 |
|
Sep. Now (ρ) |
93.88" |
|
| Mag pri |
7.14 |
|
Mag sec |
6.71 |
|
delta mag (ΔM) |
0.43 |
|
Spectral class |
F5V (yellow-white) |
|
| Pri motion ra |
-222 |
|
Sec motion ra |
-225 |
|
| Pri motion dec |
+049 |
|
Sec motion dec |
+055 |
|
| Notes |
N
Z
V
(See Notes, Parallax indicates components are physical, Proper motion indicates physical) |
|
rPM=0.029 (< 0.3, Physical double)
This double is physical.
22553-4828 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
231354 |
22 55 16 -48 27 57 |
I 22 AB |
2017 |
45 |
178 |
0.6 |
7.29 |
8.91 |
1.62 |
Y |
|
| Show |
Tau2 Gru |
231354 |
22 55 16 -48 27 57 |
I 22 AB,CD |
2017 |
25 |
181 |
93.9 |
7.14 |
6.71 |
0.43 |
|
<=== |
| Show |
|
231353 |
22 55 16 -48 29 30 |
B 2506 CD |
1964 |
5 |
267 |
0.1 |
7.30 |
7.50 |
0.20 |
|
|
Quadruple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
Tau2 Gru |
|
Constellation |
Grus |
|
SAO |
231354 |
|
HIP |
113191 |
|
| Tycho2 |
8450-01347-1 |
|
Gaia DR2 |
6515008644030385792 |
|
HD |
216655 |
|
GC |
31953 |
|
| CD |
CD-4913996 |
|
CP |
CP-4911675 |
|
Bayer |
Tau 2 Gruis |
|
Bayer name |
Tau2 Gru |
|
| Distance |
47.69 |
|
Distance ly |
155.56 |
|
Bayer greek |
τ2 Gru |
|
