00487+1841 BU 495 AB (HD 4655)
00h 48m 44.81s +18° 41' 07.9" P.A. 238.00 sep 0.4 mag 8.34,8.61 Sp G0 dist. 64.1 pc (209.09 l.y.)
| Coord 2000 |
00487+1841 |
|
Discov num |
BU 495 |
|
Comp |
AB |
|
Coord arcsec 2000 |
00 48 44.81 +18 41 07.9 |
|
| Date first |
1878 |
|
Date last |
2018 |
|
Obs |
165 |
|
| Pa first |
231 |
|
Pa last |
237.8 |
|
P.A. Now (θ) |
232.2° |
|
| Sep first |
0.6 |
|
Sep last |
0.429 |
|
Sep. Now (ρ) |
0.538" |
|
| Mag pri |
8.34 |
|
Mag sec |
8.61 |
|
delta mag (ΔM) |
0.27 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
-015 |
|
Sec motion ra |
|
|
| Pri motion dec |
-051 |
|
Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
00487+1841 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 4655 |
92095 |
00 48 45 +18 41 08 |
BU 495 AB |
2018 |
165 |
238 |
0.4 |
8.34 |
8.61 |
0.27 |
Y |
<=== |
| Show |
|
92095 |
00 48 45 +18 41 08 |
TOK 224 AC |
2015 |
10 |
139 |
152.3 |
8.34 |
10.83 |
2.49 |
|
|
| Show |
|
|
00 48 52 +18 39 13 |
RAO 5 Ca,Cb |
2013 |
2 |
321 |
0.7 |
10.83 |
12.00 |
1.17 |
|
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Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 4655 |
|
Constellation |
Pisces |
|
SAO |
92095 |
|
HIP |
3795 |
|
| Tycho2 |
1191-01284-1 |
|
HD |
4655 |
|
ADS |
673 |
|
BD |
BD+17 105 |
|
| Distance |
64.1 |
|
Distance ly |
209.09 |
|
ORBITAL ELEMENTS
| Period (P) | 143.628y | ± 4 |
Periastron (T) | 1979.856y | ± 0.27 |
Semi-major axis (a) | 0.617a | ± 0.026 |
| Eccentricity (e) | 0.5 | ± 0.01 |
Inclination (i) | 107.4° | ± 4.6 |
Longitude of periastron (ω) | 338.1° | ± 12.4 |
| Node (Ω) | 31.3° | ± 5.6 |
Notes | n | |
Reference | Sca2000b | |
| Equinox | 2000 | |
Last observation | 1998 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
309.0 |
0.168 |
| 2001 |
300.4 |
0.171 |
| 2002 |
292.2 |
0.177 |
| 2003 |
284.6 |
0.186 |
| 2004 |
277.9 |
0.198 |
| 2005 |
272.0 |
0.212 |
| 2006 |
266.9 |
0.227 |
| 2007 |
262.4 |
0.244 |
| 2008 |
258.5 |
0.261 |
| 2009 |
255.1 |
0.279 |
| 2010 |
252.1 |
0.298 |
| 2011 |
249.5 |
0.317 |
| 2012 |
247.2 |
0.336 |
| 2013 |
245.1 |
0.355 |
| 2014 |
243.2 |
0.374 |
| 2015 |
241.5 |
0.393 |
| 2016 |
240.0 |
0.412 |
| 2017 |
238.6 |
0.430 |
| 2018 |
237.3 |
0.449 |
| 2019 |
236.2 |
0.467 |
| 2020 |
235.1 |
0.485 |
| 2021 |
234.1 |
0.503 |
| 2022 |
233.1 |
0.521 |
| 2023 |
232.2 |
0.538 |
| 2024 |
231.4 |
0.555 |
| 2025 |
230.6 |
0.571 |
| 2026 |
229.9 |
0.587 |
| 2027 |
229.2 |
0.603 |
| 2028 |
228.5 |
0.618 |
| 2029 |
227.9 |
0.633 |
| 2030 |
227.3 |
0.648 |
|
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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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