02423+4925 HU 539 (HD 16692)
02h 42m 19.72s +49° 24' 58.5" P.A. 358.00 sep 0.1 mag 9.22,9.52 Sp F5 dist. 238.66 pc (778.51 l.y.)
| Coord 2000 |
02423+4925 |
|
Discov num |
HU 539 |
|
Comp |
|
|
Coord arcsec 2000 |
02 42 19.72 +49 24 58.5 |
|
| Date first |
1902 |
|
Date last |
1995 |
|
Obs |
30 |
|
| Pa first |
81 |
|
Pa last |
357.8 |
|
P.A. Now (θ) |
144.2° |
|
| Sep first |
0.3 |
|
Sep last |
0.135 |
|
Sep. Now (ρ) |
0.145" |
|
| Mag pri |
9.22 |
|
Mag sec |
9.52 |
|
delta mag (ΔM) |
0.3 |
|
Spectral class |
F5 (yellow-white) |
|
| Pri motion ra |
+028 |
|
Sec motion ra |
|
|
| Pri motion dec |
-012 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 16692 |
|
Constellation |
Perseus |
|
SAO |
38249 |
|
HIP |
12632 |
|
| Tycho2 |
3304-00739-1 |
|
Gaia DR2 |
438845155417056000 |
|
HD |
16692 |
|
ADS |
2051 |
|
| BD |
BD+48 737 |
|
Distance |
238.66 |
|
Distance ly |
778.51 |
|
ORBITAL ELEMENTS
| Period (P) | 175y | |
Periastron (T) | 2007.1y | |
Semi-major axis (a) | 0.222a | |
| Eccentricity (e) | 0.684 | |
Inclination (i) | 144.1° | |
Longitude of periastron (ω) | 124.7° | |
| Node (Ω) | 19.4° | |
Notes | | |
Reference | USN2002 | |
| Equinox | 2000 | |
Last observation | 1995 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
340.1 |
0.095 |
| 2001 |
332.9 |
0.086 |
| 2002 |
324.0 |
0.078 |
| 2003 |
313.0 |
0.070 |
| 2004 |
299.7 |
0.064 |
| 2005 |
284.0 |
0.060 |
| 2006 |
267.1 |
0.059 |
| 2007 |
250.5 |
0.061 |
| 2008 |
235.4 |
0.065 |
| 2009 |
222.4 |
0.071 |
| 2010 |
211.4 |
0.077 |
| 2011 |
202.0 |
0.083 |
| 2012 |
193.9 |
0.089 |
| 2013 |
186.9 |
0.095 |
| 2014 |
180.6 |
0.101 |
| 2015 |
175.0 |
0.106 |
| 2016 |
170.0 |
0.111 |
| 2017 |
165.4 |
0.117 |
| 2018 |
161.2 |
0.122 |
| 2019 |
157.3 |
0.126 |
| 2020 |
153.6 |
0.131 |
| 2021 |
150.3 |
0.136 |
| 2022 |
147.1 |
0.140 |
| 2023 |
144.2 |
0.145 |
| 2024 |
141.4 |
0.149 |
| 2025 |
138.8 |
0.154 |
| 2026 |
136.3 |
0.158 |
| 2027 |
134.0 |
0.162 |
| 2028 |
131.8 |
0.166 |
| 2029 |
129.7 |
0.171 |
| 2030 |
127.7 |
0.175 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
