12313+5507 BAG  50 (NO UMa)

 
 
12h 31m 18.92s +55 07' 07.6" P.A. 170.60 sep 0.1 mag 8.20,10.60 Sp K2V+K6.5V dist. 25.1 pc (81.88 l.y.)
 
 
Coord 2000
12313+5507
Discov num
BAG  50
Comp
Coord arcsec 2000
12 31 18.92 +55 07 07.6
Date first
2002
Date last
2019
Obs
28
Pa first
320
Pa last
255
P.A. Now (θ)
170.6°
Sep first
0.7
Sep last
0.1
Sep. Now (ρ)
0.08"
Mag pri
8.20
Mag sec
10.60
delta mag (ΔM)
2.4
Spectral class
K2V+K6.5V (yellow-orange/yellow-orange)
Pri motion ra
+107
Sec motion ra
Pri motion dec
-001
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
255
Precise sep
0.079
Var name
NO UMa
Constellation
Hydra
SAO
28414
HIP
61100
Tycho2
3844-00102-1
Gaia DR2
1571145907856592768
HD
109011
GL
GJ 1160
BD
BD+55 1536
Distance
25.1
Distance ly
81.88
last precise pa
255
last precise sep
0.079
 
 
ORBITAL ELEMENTS
 
 
Period (P)3.514y± 0.002 Periastron (T)2013.55y± 0.003 Semi-major axis (a)102.3m± 0.5
Eccentricity (e)0.507± 0.003 Inclination (i)58.6°± 0.3 Longitude of periastron (ω)244.5°± 0.4
Node (Ω)177.6°± 0.4 Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.094 175.7
2001 0.109 213.9
2002 0.071 280.1
2003 0.033 41.5
2004 0.118 195.3
2005 0.087 238.3
2006 0.073 326.6
2007 0.090 174.1
2008 0.110 212.8
2009 0.071 277.4
2010 0.038 30.8
2011 0.118 194.4
2012 0.089 236.6
2013 0.073 324.1
2014 0.087 172.4
2015 0.111 211.7
2016 0.071 274.8
2017 0.043 22.5
2018 0.118 193.4
2019 0.090 234.9
2020 0.072 321.5
2021 0.083 170.6
2022 0.112 210.6
2023 0.072 272.2
2024 0.047 15.8
2025 0.117 192.4
2026 0.091 233.2
2027 0.072 318.9
2028 0.080 168.5
2029 0.113 209.5
2030 0.073 269.6


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



 
 


wds12313%2B5507d.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
12313+5507 BAG 50 2006 8 5 0.1 8.21   K2V N 123118.92+550707.6
12313+5507 BAG 50 2013 12 172 0.1 8.21   K2V NO 123118.92+550707.6
12313+5507 BAG 50 2019 28 255 0.1 8.20 10.60 K2V+K6.5V NO 123118.92+550707.6

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