12508+0806 HDS1803

 
 
12h 50m 49.66s +08 05' 57.1" P.A. 44 sep 0.2 mag 9.19,9.31 Sp G5
 
 
Coord 2000
12508+0806
Discov num
HDS1803
Comp
Coord arcsec 2000
12 50 49.66 +08 05 57.1
Date first
1991
Date last
2016
Obs
6
Pa first
198
Pa last
51
P.A. Now (θ)
44°
Sep first
0.1
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
9.19
Mag sec
9.31
delta mag (ΔM)
0.12
Spectral class
G5 (yellow)
Pri motion ra
-102
Sec motion ra
Pri motion dec
-041
Sec motion dec
Notes
rPM=0.071 (< 0.3, Physical double)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Tycho2
8177-00802-1
HD
298225
last precise pa
50.8
last precise sep
0.208
 
 
ORBITAL ELEMENTS
 
 
Period (P)41.123y Periastron (T)1986.145y Semi-major axis (a)0.197a
Eccentricity (e)0.547 Inclination (i)111.9° Longitude of periastron (ω)108.8°
Node (Ω)34.3° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2018
label rho theta
2000 0.106 132.0
2001 0.107 122.6
2002 0.111 113.7
2003 0.116 105.4
2004 0.123 98.0
2005 0.131 91.4
2006 0.139 85.6
2007 0.148 80.5
2008 0.157 75.9
2009 0.166 71.9
2010 0.175 68.2
2011 0.183 64.9
2012 0.190 61.9
2013 0.197 59.0
2014 0.202 56.3
2015 0.206 53.8
2016 0.209 51.3
2017 0.209 48.9
2018 0.208 46.5
2019 0.204 44.0
2020 0.197 41.3
2021 0.187 38.5
2022 0.172 35.2
2023 0.152 31.1
2024 0.125 25.6
2025 0.091 16.4
2026 0.052 353.8
2027 0.036 280.7
2028 0.069 235.2
2029 0.102 220.4
2030 0.123 212.0

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

grafico orbita





wds12508%2B0806a.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
12508+0806 HDS1803 1991 1 198 0.1 9.19 9.31 G5 125049.66+080557.1
12508+0806 HDS1803 2007 3 79 0.2 9.19 9.31 G5 D 125049.66+080557.1
12508+0806 HDS1803 2011 5 64 0.2 9.19 9.31 G5 125049.66+080557.1
12508+0806 HDS1803 2016 6 51 0.2 9.19 9.31 G5 125049.66+080557.1

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