04201+3108 HDS 555
04h 20m 06.27s +31° 08' 27.9" P.A. 139.00 sep 0.2 mag 9.05,12.98 Sp G5 dist. 55.22 pc (180.13 l.y.)
| Coord 2000 |
04201+3108 |
|
Discov num |
HDS 555 |
|
Comp |
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Coord arcsec 2000 |
04 20 06.27 +31 08 27.9 |
|
| Date first |
1991 |
|
Date last |
2011 |
|
Obs |
6 |
|
| Pa first |
353 |
|
Pa last |
138.9 |
|
P.A. Now (θ) |
138.9° |
|
| Sep first |
0.4 |
|
Sep last |
0.168 |
|
Sep. Now (ρ) |
0.168" |
|
| Mag pri |
9.05 |
|
Mag sec |
12.98 |
|
delta mag (ΔM) |
3.93 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+091 |
|
Sec motion ra |
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| Pri motion dec |
-194 |
|
Sec motion dec |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Perseus |
|
SAO |
57165 |
|
HIP |
20227 |
|
Tycho2 |
2371-01456-1 |
|
| HD |
27323 |
|
BD |
BD+30 653 |
|
Distance |
55.22 |
|
Distance ly |
180.13 |
|
ORBITAL ELEMENTS
| Period (P) | 73.483y | ± 0.911 |
Periastron (T) | 2010.968y | ± 0.868 |
Semi-major axis (a) | 0.367a | ± 0.0098 |
| Eccentricity (e) | 0.436 | ± 0.081 |
Inclination (i) | 37.6° | ± 6 |
Longitude of periastron (ω) | 79.1° | ± 18.1 |
| Node (Ω) | 50.3° | ± 11.7 |
Notes | | |
Reference | Cve2017b | |
| Equinox | 2000 | |
Last observation | 2014 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
29.5 |
0.322 |
| 2001 |
34.2 |
0.312 |
| 2002 |
39.2 |
0.301 |
| 2003 |
44.6 |
0.288 |
| 2004 |
50.5 |
0.274 |
| 2005 |
57.2 |
0.258 |
| 2006 |
64.7 |
0.241 |
| 2007 |
73.5 |
0.223 |
| 2008 |
83.8 |
0.204 |
| 2009 |
96.1 |
0.187 |
| 2010 |
110.7 |
0.173 |
| 2011 |
127.2 |
0.166 |
| 2012 |
144.5 |
0.166 |
| 2013 |
160.9 |
0.174 |
| 2014 |
175.4 |
0.188 |
| 2015 |
187.4 |
0.207 |
| 2016 |
197.5 |
0.227 |
| 2017 |
205.8 |
0.248 |
| 2018 |
212.9 |
0.268 |
| 2019 |
219.0 |
0.287 |
| 2020 |
224.4 |
0.304 |
| 2021 |
229.2 |
0.320 |
| 2022 |
233.6 |
0.335 |
| 2023 |
237.6 |
0.348 |
| 2024 |
241.4 |
0.360 |
| 2025 |
244.9 |
0.370 |
| 2026 |
248.3 |
0.380 |
| 2027 |
251.4 |
0.388 |
| 2028 |
254.5 |
0.395 |
| 2029 |
257.5 |
0.402 |
| 2030 |
260.3 |
0.407 |
|
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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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