09260+2839 A 222 (HD 81387)
09h 26m 02.33s +28° 39' 01.5" P.A. 4.00 sep 0.4 mag 9.13,9.41 Sp F8 dist. 111.61 pc (364.07 l.y.)
Coord 2000 |
09260+2839 |
|
Discov num |
A 222 |
|
Comp |
|
|
Coord arcsec 2000 |
09 26 02.33 +28 39 01.5 |
|
Date first |
1901 |
|
Date last |
2022 |
|
Obs |
50 |
|
Pa first |
326 |
|
Pa last |
3.6 |
|
P.A. Now (θ) |
0.3° |
|
Sep first |
0.2 |
|
Sep last |
0.43 |
|
Sep. Now (ρ) |
0.405" |
|
Mag pri |
9.13 |
|
Mag sec |
9.41 |
|
delta mag (ΔM) |
0.28 |
|
Spectral class |
F8 (yellow-white) |
|
Pri motion ra |
-082 |
|
Sec motion ra |
|
|
Pri motion dec |
-081 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 81387 |
|
Constellation |
Leo |
|
SAO |
80830 |
|
HIP |
46269 |
|
Tycho2 |
1958-01539-1 |
|
Gaia DR2 |
695443337956215552 |
|
HD |
81387 |
|
ADS |
7365 |
|
BD |
BD+29 1900 |
|
Distance |
111.61 |
|
Distance ly |
364.07 |
|
ORBITAL ELEMENTS
Period (P) | 155.08y | |
Periastron (T) | 1963.43y | |
Semi-major axis (a) | 0.32a | |
Eccentricity (e) | 0.367 | |
Inclination (i) | 123.5° | |
Longitude of periastron (ω) | 40.3° | |
Node (Ω) | 191.1° | |
Notes | n | |
Reference | Hrt2014b | |
Equinox | 2000 | |
Last observation | 2009 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
19.3 |
0.343 |
2001 |
18.3 |
0.349 |
2002 |
17.3 |
0.354 |
2003 |
16.4 |
0.359 |
2004 |
15.4 |
0.364 |
2005 |
14.5 |
0.369 |
2006 |
13.6 |
0.373 |
2007 |
12.8 |
0.377 |
2008 |
11.9 |
0.381 |
2009 |
11.1 |
0.385 |
2010 |
10.3 |
0.388 |
2011 |
9.5 |
0.391 |
2012 |
8.7 |
0.393 |
2013 |
7.9 |
0.396 |
2014 |
7.1 |
0.398 |
2015 |
6.3 |
0.399 |
2016 |
5.6 |
0.401 |
2017 |
4.8 |
0.402 |
2018 |
4.1 |
0.403 |
2019 |
3.3 |
0.404 |
2020 |
2.6 |
0.405 |
2021 |
1.8 |
0.405 |
2022 |
1.1 |
0.405 |
2023 |
0.3 |
0.405 |
2024 |
359.6 |
0.405 |
2025 |
358.9 |
0.404 |
2026 |
358.1 |
0.403 |
2027 |
357.4 |
0.402 |
2028 |
356.6 |
0.401 |
2029 |
355.8 |
0.400 |
2030 |
355.1 |
0.398 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|