12268-0536 A 78 (HD 108320)
12h 26m 47.72s -05° 35' 31.6" P.A. 80.00 sep 0.3 mag 8.11,8.79 Sp F4V dist. 110.38 pc (360.06 l.y.)
Coord 2000 |
12268-0536 |
|
Discov num |
A 78 |
|
Comp |
|
|
Coord arcsec 2000 |
12 26 47.72 -05 35 31.6 |
|
Date first |
1900 |
|
Date last |
2016 |
|
Obs |
44 |
|
Pa first |
86 |
|
Pa last |
80.1 |
|
P.A. Now (θ) |
83.7° |
|
Sep first |
0.3 |
|
Sep last |
0.339 |
|
Sep. Now (ρ) |
0.358" |
|
Mag pri |
8.11 |
|
Mag sec |
8.79 |
|
delta mag (ΔM) |
0.68 |
|
Spectral class |
F4V (yellow-white) |
|
Pri motion ra |
+016 |
|
Sec motion ra |
|
|
Pri motion dec |
-014 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 108320 |
|
Constellation |
Virgo |
|
SAO |
138781 |
|
HIP |
60727 |
|
Tycho2 |
4947-01348-1 |
|
Gaia DR2 |
3680638096221825536 |
|
HD |
108320 |
|
ADS |
8551 |
|
BD |
BD-04 3281 |
|
Distance |
110.38 |
|
Distance ly |
360.06 |
|
ORBITAL ELEMENTS
Period (P) | 111.93y | ± 1.72 |
Periastron (T) | 1997.5y | ± 0.4 |
Semi-major axis (a) | 0.263a | ± 0.005 |
Eccentricity (e) | 0.798 | ± 0.008 |
Inclination (i) | 49.3° | ± 2.2 |
Longitude of periastron (ω) | 42.1° | ± 4.9 |
Node (Ω) | 249.9° | ± 3.2 |
Notes | n | |
Reference | Hrt2009 | |
Equinox | | |
Last observation | 2007 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
26.6 |
0.068 |
2001 |
40.6 |
0.092 |
2002 |
48.8 |
0.115 |
2003 |
54.3 |
0.137 |
2004 |
58.4 |
0.157 |
2005 |
61.6 |
0.175 |
2006 |
64.2 |
0.191 |
2007 |
66.4 |
0.207 |
2008 |
68.3 |
0.221 |
2009 |
70.0 |
0.235 |
2010 |
71.5 |
0.248 |
2011 |
72.8 |
0.259 |
2012 |
74.1 |
0.271 |
2013 |
75.2 |
0.281 |
2014 |
76.3 |
0.291 |
2015 |
77.3 |
0.300 |
2016 |
78.3 |
0.309 |
2017 |
79.1 |
0.317 |
2018 |
80.0 |
0.325 |
2019 |
80.8 |
0.332 |
2020 |
81.6 |
0.339 |
2021 |
82.3 |
0.346 |
2022 |
83.0 |
0.352 |
2023 |
83.7 |
0.358 |
2024 |
84.4 |
0.363 |
2025 |
85.1 |
0.369 |
2026 |
85.7 |
0.373 |
2027 |
86.3 |
0.378 |
2028 |
86.9 |
0.382 |
2029 |
87.5 |
0.386 |
2030 |
88.1 |
0.390 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|