08507+1800 A 2473 (HD 75470)
08h 50m 40.42s +18° 00' 12.2" P.A. 92.00 sep 0.2 mag 7.66,7.57 Sp G5 dist. 361.01 pc (1177.61 l.y.)
Coord 2000 |
08507+1800 |
|
Discov num |
A 2473 |
|
Comp |
|
|
Coord arcsec 2000 |
08 50 40.42 +18 00 12.2 |
|
Date first |
1912 |
|
Date last |
2016 |
|
Obs |
116 |
|
Pa first |
325 |
|
Pa last |
92.4 |
|
P.A. Now (θ) |
318.5° |
|
Sep first |
0.3 |
|
Sep last |
0.247 |
|
Sep. Now (ρ) |
0.242" |
|
Mag pri |
7.66 |
|
Mag sec |
7.57 |
|
delta mag (ΔM) |
0.09 |
|
Spectral class |
G5 (yellow) |
|
Pri motion ra |
-013 |
|
Sec motion ra |
|
|
Pri motion dec |
+012 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 75470 |
|
Constellation |
Cancer |
|
SAO |
98161 |
|
HIP |
43421 |
|
Tycho2 |
1396-02053-1 |
|
Gaia DR2 |
659943887061932160 |
|
HD |
75470 |
|
GC |
12196 |
|
ADS |
7039 |
|
BD |
BD+18 2057 |
|
Distance |
361.01 |
|
Distance ly |
1177.61 |
|
ORBITAL ELEMENTS
Period (P) | 113.4y | ± 1 |
Periastron (T) | 2018.01y | ± 0.5 |
Semi-major axis (a) | 0.979a | ± 0.04 |
Eccentricity (e) | 0.972 | ± 0.01 |
Inclination (i) | 80.2° | ± 1 |
Longitude of periastron (ω) | 89° | ± 1 |
Node (Ω) | 115° | ± 1 |
Notes | n | |
Reference | Doc2016d | |
Equinox | 2000 | |
Last observation | 2009 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
66.6 |
0.292 |
2001 |
68.1 |
0.290 |
2002 |
69.5 |
0.287 |
2003 |
71.0 |
0.284 |
2004 |
72.5 |
0.281 |
2005 |
74.1 |
0.278 |
2006 |
75.7 |
0.274 |
2007 |
77.3 |
0.269 |
2008 |
79.1 |
0.264 |
2009 |
80.8 |
0.259 |
2010 |
82.7 |
0.252 |
2011 |
84.7 |
0.244 |
2012 |
86.8 |
0.235 |
2013 |
89.1 |
0.225 |
2014 |
91.6 |
0.212 |
2015 |
94.6 |
0.195 |
2016 |
98.2 |
0.171 |
2017 |
103.4 |
0.134 |
2018 |
157.6 |
0.007 |
2019 |
305.7 |
0.138 |
2020 |
310.5 |
0.180 |
2021 |
313.7 |
0.207 |
2022 |
316.3 |
0.227 |
2023 |
318.5 |
0.242 |
2024 |
320.5 |
0.255 |
2025 |
322.3 |
0.266 |
2026 |
324.0 |
0.275 |
2027 |
325.5 |
0.283 |
2028 |
327.0 |
0.290 |
2029 |
328.4 |
0.296 |
2030 |
329.8 |
0.301 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|