21232-8703 I 337 AB
21h 23m 09.94s -87° 03' 08.4" P.A. 99.00 sep 0.2 mag 9.10,10.10 Sp G8:III dist. 33.07 pc (107.87 l.y.)
| Coord 2000 |
21232-8703 |
|
Discov num |
I 337 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 23 09.94 -87 03 08.4 |
|
| Date first |
1900 |
|
Date last |
2017 |
|
Obs |
6 |
|
| Pa first |
289 |
|
Pa last |
99.2 |
|
P.A. Now (θ) |
99.2° |
|
| Sep first |
1.0 |
|
Sep last |
0.21 |
|
Sep. Now (ρ) |
0.21" |
|
| Mag pri |
9.10 |
|
Mag sec |
10.10 |
|
delta mag (ΔM) |
1 |
|
Spectral class |
G8:III (yellow) |
|
| Pri motion ra |
+125 |
|
Sec motion ra |
|
|
| Pri motion dec |
-089 |
|
Sec motion dec |
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|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21232-8703 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
21 23 10 -87 03 08 |
I 337 AB |
2017 |
6 |
99 |
0.2 |
9.10 |
10.10 |
1.00 |
Y |
<=== |
| Show |
HD 198477 |
|
21 23 10 -87 03 08 |
HJ 5192 AB,C |
2000 |
18 |
318 |
17.9 |
8.82 |
9.02 |
0.20 |
|
|
| Show |
|
|
21 23 10 -87 03 08 |
I 337 AD |
2000 |
3 |
88 |
29.4 |
9.30 |
12.76 |
3.46 |
|
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Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Octans |
|
HIP |
105585 |
|
Tycho2 |
9532-00510-1 |
|
Gaia DR2 |
6342009495947839744 |
|
| HD |
198477 |
|
CP |
CP-87 303 |
|
Distance |
33.07 |
|
Distance ly |
107.87 |
|
ORBITAL ELEMENTS
| Period (P) | 240y | |
Periastron (T) | 2010.42y | ± 0.46 |
Semi-major axis (a) | 0.695a | ± 0.045 |
| Eccentricity (e) | 0.714 | ± 0.029 |
Inclination (i) | 88.4° | ± 2.6 |
Longitude of periastron (ω) | 148.6° | ± 6.7 |
| Node (Ω) | 279.1° | ± 1.6 |
Notes | n | |
Reference | Tok2018d | |
| Equinox | 2000 | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
281.8 |
0.174 |
| 2001 |
282.3 |
0.142 |
| 2002 |
283.3 |
0.108 |
| 2003 |
285.0 |
0.074 |
| 2004 |
289.9 |
0.039 |
| 2005 |
345.7 |
0.008 |
| 2006 |
87.8 |
0.033 |
| 2007 |
94.1 |
0.068 |
| 2008 |
96.2 |
0.101 |
| 2009 |
97.2 |
0.132 |
| 2010 |
97.9 |
0.160 |
| 2011 |
98.4 |
0.182 |
| 2012 |
98.8 |
0.200 |
| 2013 |
99.1 |
0.212 |
| 2014 |
99.4 |
0.219 |
| 2015 |
99.7 |
0.222 |
| 2016 |
100.0 |
0.220 |
| 2017 |
100.3 |
0.216 |
| 2018 |
100.6 |
0.209 |
| 2019 |
100.9 |
0.200 |
| 2020 |
101.3 |
0.189 |
| 2021 |
101.7 |
0.177 |
| 2022 |
102.2 |
0.164 |
| 2023 |
102.8 |
0.150 |
| 2024 |
103.5 |
0.136 |
| 2025 |
104.4 |
0.121 |
| 2026 |
105.5 |
0.106 |
| 2027 |
106.9 |
0.090 |
| 2028 |
109.0 |
0.075 |
| 2029 |
112.3 |
0.059 |
| 2030 |
117.8 |
0.044 |
|
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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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