12455-4552 HDS 1789 Aa,Ab (HD 110861)
12h 45m 27.62s -45° 51' 45.2" P.A. 326.00 sep 0.1 mag 10.07,10.47 Sp G8V dist. 78.43 pc (255.84 l.y.)
Coord 2000 |
12455-4552 |
|
Discov num |
HDS1789 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
12 45 27.62 -45 51 45.2 |
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Date first |
1991 |
|
Date last |
2021 |
|
Obs |
5 |
|
Pa first |
52 |
|
Pa last |
326 |
|
P.A. Now (θ) |
0 |
|
Sep first |
0.2 |
|
Sep last |
0.094 |
|
Sep. Now (ρ) |
0.107" |
|
Mag pri |
10.07 |
|
Mag sec |
10.47 |
|
delta mag (ΔM) |
0.4 |
|
Spectral class |
G8V (yellow) |
|
Pri motion ra |
-051 |
|
Sec motion ra |
|
|
Pri motion dec |
-061 |
|
Sec motion dec |
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|
Notes |
O
(Orbital solution) |
|
This double is physical.
12455-4552 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 110861 |
223647 |
12 45 28 -45 51 45 |
HDS 1789 Aa,Ab |
2021 |
5 |
326 |
0.1 |
10.07 |
10.47 |
0.40 |
Y |
<=== |
Show |
|
223647 |
12 45 28 -45 51 45 |
DON 554 AB |
1948 |
3 |
313 |
1.3 |
10.07 |
13.60 |
3.53 |
|
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Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 110861 |
|
Constellation |
Centaurus |
|
SAO |
223647 |
|
HIP |
62252 |
|
Tycho2 |
8245-00584-1 |
|
Gaia DR2 |
6129293062999434240 |
|
HD |
110861 |
|
CD |
CD-45 7991 |
|
CP |
CP-45 6023 |
|
Distance |
78.43 |
|
Distance ly |
255.84 |
|
ORBITAL ELEMENTS
Period (P) | 36.34y | |
Periastron (T) | 2019.77y | |
Semi-major axis (a) | 0.161a | |
Eccentricity (e) | 0.25 | |
Inclination (i) | 38° | |
Longitude of periastron (ω) | 239.1° | |
Node (Ω) | 63.8° | |
Notes | | |
Reference | Tok2020g | |
Equinox | 2000 | |
Last observation | 2020 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
106.2 |
0.177 |
2001 |
112.6 |
0.173 |
2002 |
119.3 |
0.169 |
2003 |
126.3 |
0.165 |
2004 |
133.7 |
0.160 |
2005 |
141.5 |
0.156 |
2006 |
149.7 |
0.153 |
2007 |
158.3 |
0.150 |
2008 |
167.1 |
0.148 |
2009 |
176.2 |
0.146 |
2010 |
185.4 |
0.146 |
2011 |
194.7 |
0.145 |
2012 |
204.0 |
0.145 |
2013 |
213.4 |
0.144 |
2014 |
222.9 |
0.142 |
2015 |
232.8 |
0.139 |
2016 |
243.3 |
0.134 |
2017 |
254.8 |
0.127 |
2018 |
267.8 |
0.118 |
2019 |
283.0 |
0.109 |
2020 |
300.9 |
0.101 |
2021 |
321.1 |
0.097 |
2022 |
341.5 |
0.099 |
2023 |
|
0.107 |
2024 |
15.5 |
0.118 |
2025 |
28.2 |
0.131 |
2026 |
38.6 |
0.143 |
2027 |
47.5 |
0.154 |
2028 |
55.2 |
0.164 |
2029 |
62.1 |
0.172 |
2030 |
68.6 |
0.177 |
|
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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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