13203+1746 A  2166 (KR Com)

 
 
13h 20m 15.78s +17 45' 57.7" P.A. 323.70 sep 0.1 mag 7.78,8.38 Sp F8V dist. 83.96 pc (273.88 l.y.)
 
 
Coord 2000
13203+1746
Discov num
A  2166
Comp
Coord arcsec 2000
13 20 15.78 +17 45 57.7
Date first
1910
Date last
2015
Obs
52
Pa first
7
Pa last
6
P.A. Now (θ)
323.7°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.05"
Mag pri
7.78
Mag sec
8.38
delta mag (ΔM)
0.6
Spectral class
F8V (yellow-white)
Pri motion ra
-005
Sec motion ra
Pri motion dec
-078
Sec motion dec
Notes
N O (See Notes, Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
5.6
Precise sep
0.136
Var name
KR Com
Constellation
Coma Berenices
SAO
100517
HIP
65069
Tycho2
1461-00806-1
Gaia DR2
85591624704
HD
115955
ADS
8863
BD
BD+18 2716
Distance
83.96
Distance ly
273.88
last precise pa
5.6
last precise sep
0.136
 
 
ORBITAL ELEMENTS
 
 
Period (P)11.228y Periastron (T)2007.128y Semi-major axis (a)0.098a
Eccentricity (e)0.823 Inclination (i)67.8° Longitude of periastron (ω)314.9°
Node (Ω)197.9° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2020
label rho theta
2000 0.113 350.7
2001 0.129 355.2
2002 0.139 358.8
2003 0.142 2.2
2004 0.137 5.6
2005 0.121 9.5
2006 0.088 15.5
2007 0.010 69.6
2008 0.028 286.0
2009 0.057 329.0
2010 0.085 342.4
2011 0.109 349.5
2012 0.126 354.3
2013 0.137 358.1
2014 0.142 1.4
2015 0.139 4.8
2016 0.125 8.5
2017 0.097 13.8
2018 0.036 30.0
2019 0.025 264.0
2020 0.050 323.7
2021 0.079 340.2
2022 0.104 348.1
2023 0.123 353.3
2024 0.135 357.2
2025 0.141 0.7
2026 0.140 4.0
2027 0.130 7.6
2028 0.106 12.3
2029 0.056 22.6
2030 0.024 238.2

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
 
grafico orbita






wds13203%2B1746c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
13203+1746 A 2166 2006 45 198 0.1 7.78 8.38 F8V NOD 132015.78+174557.7
13203+1746 A 2166 2007 46 219 0.0 7.78 8.38 F8V NOD 132015.78+174557.7
13203+1746 A 2166 2012 50 355 0.1 7.78 8.38 F8V NO 132015.78+174557.7
13203+1746 A 2166 2015 52 6 0.1 7.78 8.38 F8V NO 132015.78+174557.7

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