00492+5720 A 921 AB
00h 49m 09.10s +57° 19' 37.6" P.A. 2.00 sep 0.2 mag 9.00,9.50 Sp G5
Coord 2000 |
00492+5720 |
|
Discov num |
A 921 |
|
Comp |
AB |
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Coord arcsec 2000 |
00 49 09.10 +57 19 37.6 |
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Date first |
1905 |
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Date last |
2008 |
|
Obs |
15 |
|
Pa first |
39 |
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Pa last |
2.1 |
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P.A. Now (θ) |
33.2° |
|
Sep first |
0.2 |
|
Sep last |
0.239 |
|
Sep. Now (ρ) |
0.181" |
|
Mag pri |
9.00 |
|
Mag sec |
9.50 |
|
delta mag (ΔM) |
0.5 |
|
Spectral class |
G5 (yellow) |
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Pri motion ra |
+016 |
|
Sec motion ra |
|
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Pri motion dec |
+020 |
|
Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
00492+5720 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
21736 |
00 49 09 +57 19 38 |
A 921 AB |
2008 |
15 |
2 |
0.2 |
9.00 |
9.50 |
0.50 |
Y |
<=== |
Show |
|
21736 |
00 49 09 +57 19 38 |
A 921 AB,C |
2011 |
10 |
268 |
4.7 |
8.60 |
14.00 |
5.40 |
|
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Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Cassiopeia |
|
SAO |
21736 |
|
Tycho2 |
3663-02675-1 |
|
Gaia DR2 |
423900666397110016 |
|
HD |
236538 |
|
ADS |
674 |
|
ORBITAL ELEMENTS
Period (P) | 120.47y | |
Periastron (T) | 1982.4y | |
Semi-major axis (a) | 0.221a | |
Eccentricity (e) | 0.696 | |
Inclination (i) | 59.6° | |
Longitude of periastron (ω) | 96.6° | |
Node (Ω) | 140.3° | |
Notes | n | |
Reference | Cve2012 | |
Equinox | 2000 | |
Last observation | 2007 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
353.6 |
0.166 |
2001 |
355.5 |
0.168 |
2002 |
357.4 |
0.169 |
2003 |
359.3 |
0.170 |
2004 |
1.1 |
0.171 |
2005 |
2.9 |
0.172 |
2006 |
4.6 |
0.173 |
2007 |
6.4 |
0.174 |
2008 |
8.1 |
0.175 |
2009 |
9.9 |
0.175 |
2010 |
11.6 |
0.176 |
2011 |
13.3 |
0.176 |
2012 |
15.0 |
0.177 |
2013 |
16.7 |
0.177 |
2014 |
18.4 |
0.178 |
2015 |
20.1 |
0.178 |
2016 |
21.7 |
0.178 |
2017 |
23.4 |
0.179 |
2018 |
25.0 |
0.179 |
2019 |
26.7 |
0.180 |
2020 |
28.3 |
0.180 |
2021 |
30.0 |
0.180 |
2022 |
31.6 |
0.181 |
2023 |
33.2 |
0.181 |
2024 |
34.8 |
0.182 |
2025 |
36.4 |
0.182 |
2026 |
38.0 |
0.182 |
2027 |
39.6 |
0.183 |
2028 |
41.2 |
0.183 |
2029 |
42.8 |
0.184 |
2030 |
44.3 |
0.184 |
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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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