21310-3633 B 1008 AB
21h 30m 57.70s -36° 32' 49.7" P.A. 206.00 sep 0.1 mag 8.87,8.06 Sp F3V dist. 101.32 pc (330.51 l.y.)
| Coord 2000 |
21310-3633 |
|
Discov num |
B 1008 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 30 57.70 -36 32 49.7 |
|
| Date first |
1927 |
|
Date last |
2021 |
|
Obs |
32 |
|
| Pa first |
31 |
|
Pa last |
205.9 |
|
P.A. Now (θ) |
204.4° |
|
| Sep first |
0.3 |
|
Sep last |
0.082 |
|
Sep. Now (ρ) |
0.093" |
|
| Mag pri |
8.87 |
|
Mag sec |
8.06 |
|
delta mag (ΔM) |
0.81 |
|
Spectral class |
F3V (yellow-white) |
|
| Pri motion ra |
-014 |
|
Sec motion ra |
-014 |
|
| Pri motion dec |
+024 |
|
Sec motion dec |
+024 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
21310-3633 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
213058 |
21 30 58 -36 32 50 |
B 1008 AB |
2021 |
32 |
206 |
0.1 |
8.87 |
8.06 |
0.81 |
Y |
<=== |
| Show |
|
213058 |
21 30 58 -36 32 50 |
HJ 5275 AB,C |
2020 |
7 |
200 |
40.4 |
7.69 |
11.30 |
3.61 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Grus |
|
SAO |
213058 |
|
HIP |
106224 |
|
Tycho2 |
7486-00774-1 |
|
| Gaia DR2 |
6589186684899120896 |
|
HD |
204635 |
|
GC |
30115 |
|
CD |
CD-3714317 |
|
| Distance |
101.32 |
|
Distance ly |
330.51 |
|
ORBITAL ELEMENTS
| Period (P) | 74.2y | |
Periastron (T) | 2020.43y | |
Semi-major axis (a) | 0.228a | |
| Eccentricity (e) | 0.58 | |
Inclination (i) | 101.6° | |
Longitude of periastron (ω) | 162.1° | |
| Node (Ω) | 32.1° | |
Notes | n | |
Reference | Tok2018b | |
| Equinox | 2000 | |
Last observation | 2017 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
29.7 |
0.300 |
| 2001 |
29.3 |
0.290 |
| 2002 |
28.8 |
0.280 |
| 2003 |
28.2 |
0.269 |
| 2004 |
27.6 |
0.257 |
| 2005 |
27.0 |
0.244 |
| 2006 |
26.2 |
0.230 |
| 2007 |
25.4 |
0.214 |
| 2008 |
24.4 |
0.198 |
| 2009 |
23.3 |
0.180 |
| 2010 |
21.8 |
0.161 |
| 2011 |
20.0 |
0.141 |
| 2012 |
17.6 |
0.119 |
| 2013 |
14.0 |
0.097 |
| 2014 |
8.1 |
0.073 |
| 2015 |
356.6 |
0.049 |
| 2016 |
327.4 |
0.030 |
| 2017 |
270.1 |
0.029 |
| 2018 |
237.9 |
0.047 |
| 2019 |
225.0 |
0.068 |
| 2020 |
218.1 |
0.086 |
| 2021 |
213.1 |
0.096 |
| 2022 |
208.8 |
0.098 |
| 2023 |
204.4 |
0.093 |
| 2024 |
199.1 |
0.083 |
| 2025 |
192.0 |
0.070 |
| 2026 |
181.5 |
0.056 |
| 2027 |
164.4 |
0.044 |
| 2028 |
138.1 |
0.037 |
| 2029 |
108.5 |
0.039 |
| 2030 |
86.8 |
0.049 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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