20298+0941 AST 2 AB
20h 29m 48.41s +09° 41' 19.3" P.A. 94.00 sep 0.2 mag 13.11,16.38 Sp M4.5V
Coord 2000 |
20298+0941 |
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Discov num |
AST 2 |
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Comp |
AB |
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Coord arcsec 2000 |
20 29 48.41 +09 41 19.3 |
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Date first |
1996 |
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Date last |
2021 |
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Obs |
30 |
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Pa first |
269 |
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Pa last |
94.3 |
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P.A. Now (θ) |
94.3° |
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Sep first |
0.2 |
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Sep last |
0.154 |
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Sep. Now (ρ) |
0.154" |
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Mag pri |
13.11 |
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Mag sec |
16.38 |
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delta mag (ΔM) |
3.27 |
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Spectral class |
M4.5V (red) |
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Pri motion ra |
+669 |
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Sec motion ra |
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Pri motion dec |
+101 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
20298+0941 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
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20 29 48 +09 41 19 |
AST 2 AB |
2021 |
30 |
94 |
0.2 |
13.11 |
16.38 |
3.27 |
Y |
<=== |
Show |
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20 29 48 +09 41 19 |
CRC 37 AD |
2012 |
1 |
201 |
9.2 |
8.20 |
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
ORBITAL ELEMENTS
Period (P) | 1.4694y | |
Periastron (T) | 2019.248y | |
Semi-major axis (a) | 0.11a | |
Eccentricity (e) | 0.645 | |
Inclination (i) | 138° | |
Longitude of periastron (ω) | 232.7° | |
Node (Ω) | 129.6° | |
Notes | n | |
Reference | Tok2019h | |
Equinox | 2000 | |
Last observation | 2019 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
2.6 |
0.070 |
2001 |
76.2 |
0.144 |
2002 |
110.2 |
0.144 |
2003 |
337.4 |
0.058 |
2004 |
71.0 |
0.137 |
2005 |
105.5 |
0.151 |
2006 |
294.9 |
0.041 |
2007 |
65.2 |
0.129 |
2008 |
101.1 |
0.155 |
2009 |
202.1 |
0.035 |
2010 |
58.6 |
0.120 |
2011 |
96.8 |
0.157 |
2012 |
154.3 |
0.064 |
2013 |
50.9 |
0.111 |
2014 |
92.6 |
0.157 |
2015 |
136.9 |
0.091 |
2016 |
41.6 |
0.100 |
2017 |
88.4 |
0.155 |
2018 |
126.8 |
0.111 |
2019 |
30.1 |
0.089 |
2020 |
84.1 |
0.152 |
2021 |
119.5 |
0.127 |
2022 |
15.2 |
0.078 |
2023 |
79.5 |
0.148 |
2024 |
113.7 |
0.138 |
2025 |
355.3 |
0.066 |
2026 |
74.6 |
0.142 |
2027 |
108.6 |
0.146 |
2028 |
326.3 |
0.053 |
2029 |
69.2 |
0.135 |
2030 |
104.0 |
0.152 |
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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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