23104+4901 STF 2987 (HD 218790)
23h 10m 21.28s +49° 01' 06.0" P.A. 149.00 sep 4.2 mag 7.42,10.41 Sp G1V dist. 45.39 pc (148.06 l.y.)
Coord 2000 |
23104+4901 |
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Discov num |
STF2987 |
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Comp |
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Coord arcsec 2000 |
23 10 21.28 +49 01 06.0 |
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Date first |
1828 |
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Date last |
2022 |
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Obs |
47 |
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Pa first |
172 |
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Pa last |
149 |
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P.A. Now (θ) |
149° |
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Sep first |
2.8 |
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Sep last |
4.16 |
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Sep. Now (ρ) |
4.16" |
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Mag pri |
7.42 |
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Mag sec |
10.41 |
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delta mag (ΔM) |
2.99 |
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Spectral class |
G1V (yellow) |
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Pri motion ra |
+232 |
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Sec motion ra |
+237 |
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Pri motion dec |
+056 |
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Sec motion dec |
+052 |
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Notes |
N
O
V
(See Notes, Orbital solution, Proper motion indicates physical) |
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rPM=0.026 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 218790 |
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Constellation |
Andromeda |
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SAO |
52759 |
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HIP |
114420 |
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Tycho2 |
3631-01135-1 |
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Gaia DR2 |
1990678072815187840 |
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HD |
218790 |
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GC |
32283 |
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ADS |
16562 |
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BD |
BD+48 3952 |
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Distance |
45.39 |
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Distance ly |
148.06 |
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ORBITAL ELEMENTS
Period (P) | 2176.7924y | ± 963.9942 |
Periastron (T) | 1740.757y | ± 265.6893 |
Semi-major axis (a) | 8.12352a | ± 4.13838 |
Eccentricity (e) | 0.85736 | ± 0.11548 |
Inclination (i) | 105.825° | ± 7.753 |
Longitude of periastron (ω) | 94.316° | ± 12.222 |
Node (Ω) | 0.967° | ± 39.346 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
151.4 |
4.164 |
2001 |
151.3 |
4.166 |
2002 |
151.2 |
4.167 |
2003 |
151.1 |
4.168 |
2004 |
151.0 |
4.169 |
2005 |
150.9 |
4.170 |
2006 |
150.9 |
4.171 |
2007 |
150.8 |
4.172 |
2008 |
150.7 |
4.174 |
2009 |
150.6 |
4.175 |
2010 |
150.5 |
4.176 |
2011 |
150.4 |
4.177 |
2012 |
150.3 |
4.178 |
2013 |
150.2 |
4.178 |
2014 |
150.2 |
4.179 |
2015 |
150.1 |
4.180 |
2016 |
150.0 |
4.181 |
2017 |
149.9 |
4.182 |
2018 |
149.8 |
4.183 |
2019 |
149.7 |
4.184 |
2020 |
149.6 |
4.185 |
2021 |
149.5 |
4.185 |
2022 |
149.5 |
4.186 |
2023 |
149.4 |
4.187 |
2024 |
149.3 |
4.188 |
2025 |
149.2 |
4.188 |
2026 |
149.1 |
4.189 |
2027 |
149.0 |
4.190 |
2028 |
148.9 |
4.191 |
2029 |
148.8 |
4.191 |
2030 |
148.8 |
4.192 |
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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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