20182+2912 A  1205

 
 
20h 18m 13.44s +29 12' 15.0" P.A. 96.6 sep 1.24 mag 9.17,10.08 Sp M0 dist. 34.72 pc (113.26 l.y.)
 
 
Coord 2000
20182+2912
Discov num
A  1205
Comp
Coord arcsec 2000
20 18 13.44 +29 12 15.0
Date first
1905
Date last
2018
Obs
63
Pa first
346
Pa last
96
P.A. Now (θ)
96.6°
Sep first
0.3
Sep last
1.2
Sep. Now (ρ)
1.24"
Mag pri
9.17
Mag sec
10.08
delta mag (ΔM)
0.91
Spectral class
M0 (red)
Pri motion ra
-006
Sec motion ra
-006
Pri motion dec
-087
Sec motion dec
-087
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
96
Precise sep
1.232
Constellation
Vulpecula
SAO
88492
HIP
100079
Tycho2
2167-01052-1
Gaia DR2
76179555712
HD
334100
ADS
13665
BD
BD+28 3698
Distance
34.72
Distance ly
113.26
last precise pa
96
last precise sep
1.232
 
 
ORBITAL ELEMENTS
 
 
Period (P)493.2y Periastron (T)1970.78y Semi-major axis (a)1.942a
Eccentricity (e)0.913 Inclination (i)98.1° Longitude of periastron (ω)74°
Node (Ω)285.72° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2005
label rho theta
2000 1.038 98.8
2001 1.052 98.7
2002 1.066 98.6
2003 1.079 98.4
2004 1.091 98.3
2005 1.104 98.2
2006 1.115 98.0
2007 1.127 97.9
2008 1.138 97.8
2009 1.149 97.7
2010 1.160 97.5
2011 1.170 97.4
2012 1.180 97.3
2013 1.189 97.2
2014 1.199 97.1
2015 1.208 97.0
2016 1.217 96.9
2017 1.225 96.8
2018 1.234 96.7
2019 1.242 96.6
2020 1.250 96.5
2021 1.257 96.4
2022 1.265 96.3
2023 1.272 96.2
2024 1.279 96.1
2025 1.286 96.0
2026 1.293 95.9
2027 1.299 95.8
2028 1.305 95.7
2029 1.312 95.6
2030 1.317 95.5

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






wds20182%2B2912b.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
20182+2912 A 1205 2007 55 98 1.1 9.17 10.08 M0 NOD 201813.44+291215.0
20182+2912 A 1205 2009 56 98 1.1 9.17 10.08 M0 NOD 201813.44+291215.0
20182+2912 A 1205 2010 57 97 1.2 9.17 10.08 M0 NOD 201813.44+291215.0
20182+2912 A 1205 2016 60 96 1.2 9.17 10.08 M0 O 201813.44+291215.0
20182+2912 A 1205 2017 62 97 1.2 9.17 10.08 M0 O 201813.44+291215.0

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