00095+1907 COU 247 (HD 489)
00h 09m 28.15s +19° 06' 56.8" P.A. 213.00 sep 0.3 mag 8.29,9.98 Sp G3V dist. 68.12 pc (222.21 l.y.)
Coord 2000 |
00095+1907 |
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Discov num |
COU 247 |
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Comp |
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Coord arcsec 2000 |
00 09 28.15 +19 06 56.8 |
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Date first |
1967 |
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Date last |
2017 |
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Obs |
37 |
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Pa first |
31 |
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Pa last |
213.2 |
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P.A. Now (θ) |
213.2° |
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Sep first |
0.4 |
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Sep last |
0.32 |
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Sep. Now (ρ) |
0.32" |
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Mag pri |
8.29 |
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Mag sec |
9.98 |
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delta mag (ΔM) |
1.69 |
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Spectral class |
G3V (yellow) |
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Pri motion ra |
+267 |
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Sec motion ra |
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Pri motion dec |
+024 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 489 |
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Constellation |
Pegasus |
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SAO |
91742 |
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HIP |
768 |
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Tycho2 |
1181-00051-1 |
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Gaia DR2 |
2798013314642147968 |
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HD |
489 |
|
GC |
157 |
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BD |
BD+18 3 |
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Distance |
68.12 |
|
Distance ly |
222.21 |
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ORBITAL ELEMENTS
Period (P) | 159.51y | |
Periastron (T) | 2005.8y | |
Semi-major axis (a) | 0.543a | |
Eccentricity (e) | 0.309 | |
Inclination (i) | 137° | |
Longitude of periastron (ω) | 103.4° | |
Node (Ω) | 21.1° | |
Notes | | |
Reference | Doc2012i | |
Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
307.7 |
0.286 |
2001 |
301.9 |
0.281 |
2002 |
296.0 |
0.278 |
2003 |
289.9 |
0.276 |
2004 |
283.8 |
0.276 |
2005 |
277.8 |
0.278 |
2006 |
271.9 |
0.282 |
2007 |
266.2 |
0.287 |
2008 |
260.6 |
0.293 |
2009 |
255.4 |
0.301 |
2010 |
250.5 |
0.310 |
2011 |
245.8 |
0.320 |
2012 |
241.4 |
0.330 |
2013 |
237.3 |
0.341 |
2014 |
233.4 |
0.351 |
2015 |
229.8 |
0.362 |
2016 |
226.4 |
0.373 |
2017 |
223.1 |
0.384 |
2018 |
220.1 |
0.394 |
2019 |
217.2 |
0.404 |
2020 |
214.4 |
0.414 |
2021 |
211.7 |
0.423 |
2022 |
209.2 |
0.432 |
2023 |
206.8 |
0.440 |
2024 |
204.4 |
0.448 |
2025 |
202.2 |
0.455 |
2026 |
200.0 |
0.462 |
2027 |
197.8 |
0.468 |
2028 |
195.7 |
0.474 |
2029 |
193.7 |
0.479 |
2030 |
191.7 |
0.484 |
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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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