12272+2701 STF 1643 AB (HD 108421)
12h 27m 13.72s +27° 01' 29.6" P.A. 3.00 sep 2.8 mag 9.03,9.45 Sp K2 dist. 27.21 pc (88.76 l.y.)
Coord 2000 |
12272+2701 |
|
Discov num |
STF1643 |
|
Comp |
AB |
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Coord arcsec 2000 |
12 27 13.72 +27 01 29.6 |
|
Date first |
1830 |
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Date last |
2020 |
|
Obs |
253 |
|
Pa first |
71 |
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Pa last |
3.1 |
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P.A. Now (θ) |
3.1° |
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Sep first |
2.0 |
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Sep last |
2.76 |
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Sep. Now (ρ) |
2.76" |
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Mag pri |
9.03 |
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Mag sec |
9.45 |
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delta mag (ΔM) |
0.42 |
|
Spectral class |
K2 (yellow-orange) |
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Pri motion ra |
+094 |
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Sec motion ra |
+084 |
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Pri motion dec |
-248 |
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Sec motion dec |
-242 |
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Notes |
N
O
V
(See Notes, Orbital solution, Proper motion indicates physical) |
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rPM=0.044 (< 0.3, Physical double)
This double is physical.
12272+2701 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 108421 |
82315 |
12 27 14 +27 01 30 |
STF 1643 AB |
2020 |
253 |
3 |
2.8 |
9.03 |
9.45 |
0.42 |
Y |
<=== |
Show |
|
82315 |
12 27 14 +27 01 30 |
LEP 54 AC |
2015 |
4 |
261 |
221.4 |
9.03 |
14.78 |
5.75 |
|
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 108421 |
|
Constellation |
Coma Berenices |
|
SAO |
82315 |
|
HIP |
60759 |
|
Tycho2 |
1991-00865-1 |
|
Gaia DR2 |
4008897567571892480 |
|
HD |
108421 |
|
GC |
16971 |
|
ADS |
8553 |
|
GL |
NN 3725A |
|
BD |
BD+27 2135 |
|
Distance |
27.21 |
|
Distance ly |
88.76 |
|
ORBITAL ELEMENTS
Period (P) | 549.41y | |
Periastron (T) | 2193.49y | |
Semi-major axis (a) | 2.695a | |
Eccentricity (e) | 0.58 | |
Inclination (i) | 115.2° | |
Longitude of periastron (ω) | 286.1° | |
Node (Ω) | 155.3° | |
Notes | n | |
Reference | Ole2003b | |
Equinox | 2000 | |
Last observation | 2000 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
7.3 |
2.645 |
2001 |
7.1 |
2.650 |
2002 |
6.8 |
2.655 |
2003 |
6.6 |
2.660 |
2004 |
6.4 |
2.665 |
2005 |
6.1 |
2.670 |
2006 |
5.9 |
2.675 |
2007 |
5.7 |
2.680 |
2008 |
5.5 |
2.684 |
2009 |
5.2 |
2.689 |
2010 |
5.0 |
2.694 |
2011 |
4.8 |
2.698 |
2012 |
4.5 |
2.702 |
2013 |
4.3 |
2.707 |
2014 |
4.1 |
2.711 |
2015 |
3.9 |
2.715 |
2016 |
3.7 |
2.719 |
2017 |
3.4 |
2.723 |
2018 |
3.2 |
2.727 |
2019 |
3.0 |
2.731 |
2020 |
2.8 |
2.735 |
2021 |
2.5 |
2.739 |
2022 |
2.3 |
2.742 |
2023 |
2.1 |
2.746 |
2024 |
1.9 |
2.749 |
2025 |
1.7 |
2.753 |
2026 |
1.4 |
2.756 |
2027 |
1.2 |
2.759 |
2028 |
1.0 |
2.762 |
2029 |
0.8 |
2.765 |
2030 |
0.6 |
2.768 |
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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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