12272+2701 STF1643AB

 
 
12h 27m 13.72s +27 01' 29.6" P.A. 3.2 sep 2.73 mag 9.03,9.45 Sp K2 dist. 27.21 pc (88.76 l.y.)
 
 
Coord 2000
12272+2701
Discov num
STF1643
Comp
AB
Coord arcsec 2000
12 27 13.72 +27 01 29.6
Date first
1830
Date last
2017
Obs
241
Pa first
71
Pa last
3
P.A. Now (θ)
3.2°
Sep first
2.0
Sep last
2.7
Sep. Now (ρ)
2.73"
Mag pri
9.03
Mag sec
9.45
delta mag (ΔM)
0.42
Spectral class
K2 (yellow-orange)
Pri motion ra
+096
Sec motion ra
+085
Pri motion dec
-229
Sec motion dec
-240
Notes
N O (See Notes, Orbital solution)
rPM=0.061 (< 0.3, Physical double)
This double is physical.
 
 
12272+2701 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 82315 12272+2701 STF1643 AB 1830 2017 241 3 2.7 9.03 9.45 0.42 Y <===
Show 82315 12272+2701 LEP 54 AC 2000 2010 3 261 221.7 9.03 14.78 5.75
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
3.4
Precise sep
2.747
Constellation
Coma Berenices
SAO
82315
HIP
60759
Tycho2
1991-00865-1
HD
108421
ADS
8553
GL
NN 3725A
BD
BD+27 2135
Distance
27.21
Distance ly
88.76
last precise pa
3.4
last precise sep
2.747
 
 
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° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2000
label rho theta
2000 2.645 7.3
2001 2.650 7.1
2002 2.655 6.8
2003 2.660 6.6
2004 2.665 6.4
2005 2.670 6.1
2006 2.675 5.9
2007 2.680 5.7
2008 2.684 5.5
2009 2.689 5.2
2010 2.694 5.0
2011 2.698 4.8
2012 2.702 4.5
2013 2.707 4.3
2014 2.711 4.1
2015 2.715 3.9
2016 2.719 3.7
2017 2.723 3.4
2018 2.727 3.2
2019 2.731 3.0
2020 2.735 2.8
2021 2.739 2.5
2022 2.742 2.3
2023 2.746 2.1
2024 2.749 1.9
2025 2.753 1.7
2026 2.756 1.4
2027 2.759 1.2
2028 2.762 1.0
2029 2.765 0.8
2030 2.768 0.6

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

grafico orbita





wds12272%2B2701b.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
12272+2701 STF1643 AB 2010 218 5 2.6 9.03 9.45 K2 NCD 122713.72+270129.6
12272+2701 STF1643 AB 2012 220 5 2.6 9.03 9.45 K2 NCD 122713.72+270129.6
12272+2701 STF1643 AB 2013 228 5 2.8 9.03 9.45 K2 NCD 122713.72+270129.6
12272+2701 STF1643 AB 2014 228 4 2.7 9.03 9.45 K2 NCD 122713.72+270129.6
12272+2701 STF1643 AB 2015 239 4 2.7 9.03 9.45 K2 NO 122713.72+270129.6
12272+2701 STF1643 AB 2017 241 3 2.7 9.03 9.45 K2 NO 122713.72+270129.6

If you need more information about this double, apply for a data request form to the WDS.