21491-7206 HEI 598 (AY Ind)
21h 49m 05.88s -72° 06' 08.8" P.A. 153.00 sep 0.7 mag 10.11,11.17 Sp M2Ve dist. 16.32 pc (53.24 l.y.)
| Coord 2000 |
21491-7206 |
|
Discov num |
HEI 598 |
|
Comp |
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Coord arcsec 2000 |
21 49 05.88 -72 06 08.8 |
|
| Date first |
1989 |
|
Date last |
2021 |
|
Obs |
8 |
|
| Pa first |
5 |
|
Pa last |
152.5 |
|
P.A. Now (θ) |
152.5° |
|
| Sep first |
1.3 |
|
Sep last |
0.69 |
|
Sep. Now (ρ) |
0.69" |
|
| Mag pri |
10.11 |
|
Mag sec |
11.17 |
|
delta mag (ΔM) |
1.06 |
|
Spectral class |
M2Ve (red) |
|
| Pri motion ra |
+320 |
|
Sec motion ra |
+320 |
|
| Pri motion dec |
-303 |
|
Sec motion dec |
-303 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Var name |
AY Ind |
|
Constellation |
Indus |
|
HIP |
107705 |
|
Tycho2 |
9331-00189-1 |
|
| GL |
GJ 1264 |
|
CD |
CD-72 1700 |
|
CP |
CP-72 2640 |
|
Distance |
16.32 |
|
| Distance ly |
53.24 |
|
ORBITAL ELEMENTS
| Period (P) | 120y | |
Periastron (T) | 2016.44y | |
Semi-major axis (a) | 1.565a | |
| Eccentricity (e) | 0.349 | |
Inclination (i) | 51.8° | |
Longitude of periastron (ω) | 67.8° | |
| Node (Ω) | 42.8° | |
Notes | | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | 2019 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
29.9 |
1.307 |
| 2001 |
32.4 |
1.295 |
| 2002 |
35.0 |
1.279 |
| 2003 |
37.6 |
1.260 |
| 2004 |
40.3 |
1.237 |
| 2005 |
43.2 |
1.210 |
| 2006 |
46.2 |
1.180 |
| 2007 |
49.3 |
1.145 |
| 2008 |
52.7 |
1.106 |
| 2009 |
56.3 |
1.063 |
| 2010 |
60.2 |
1.016 |
| 2011 |
64.6 |
0.967 |
| 2012 |
69.4 |
0.915 |
| 2013 |
74.8 |
0.862 |
| 2014 |
80.9 |
0.810 |
| 2015 |
87.8 |
0.761 |
| 2016 |
95.6 |
0.716 |
| 2017 |
104.4 |
0.680 |
| 2018 |
114.0 |
0.654 |
| 2019 |
124.2 |
0.642 |
| 2020 |
134.5 |
0.644 |
| 2021 |
144.6 |
0.661 |
| 2022 |
154.0 |
0.691 |
| 2023 |
162.4 |
0.731 |
| 2024 |
169.9 |
0.780 |
| 2025 |
176.4 |
0.835 |
| 2026 |
182.1 |
0.893 |
| 2027 |
187.1 |
0.953 |
| 2028 |
191.5 |
1.013 |
| 2029 |
195.5 |
1.073 |
| 2030 |
199.0 |
1.132 |
|
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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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