00279+2220 FRV   1

 
 
00h 27m 55.93s +22 19' 32.8" P.A. 310.70 sep 0.1 mag 10.15,10.46 Sp M7.5+M8.0
 
 
Coord 2000
00279+2220
Discov num
FRV   1
Comp
Coord arcsec 2000
00 27 55.93 +22 19 32.8
Date first
2004
Date last
2019
Obs
35
Pa first
13
Pa last
17
P.A. Now (θ)
310.7°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.07"
Mag pri
10.15
Mag sec
10.46
delta mag (ΔM)
0.31
Spectral class
M7.5+M8.0 (red/red)
Pri motion ra
+400
Sec motion ra
Pri motion dec
-177
Sec motion dec
Notes
N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
17.3
Precise sep
0.117
Constellation
Hydra
last precise pa
17.3
last precise sep
0.117
 
 
ORBITAL ELEMENTS
 
 
Period (P)7.698y± 0.014 Periastron (T)57758d (2017.012y)± 15 Semi-major axis (a)145.99m± 0.18
Eccentricity (e)0.0468± 0.0019 Inclination (i)117.36°± 0.11 Longitude of periastron (ω)262.2°± 1.8
Node (Ω)36.64°± 0.1 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.145 216.0
2001 0.102 187.4
2002 0.069 102.0
2003 0.130 50.4
2004 0.143 27.9
2005 0.094 355.4
2006 0.078 276.3
2007 0.132 232.1
2008 0.139 209.2
2009 0.081 170.6
2010 0.086 78.4
2011 0.142 43.0
2012 0.132 20.6
2013 0.078 336.4
2014 0.094 257.4
2015 0.142 224.7
2016 0.126 201.3
2017 0.066 144.5
2018 0.107 63.3
2019 0.147 36.4
2020 0.117 11.8
2021 0.070 310.7
2022 0.112 244.2
2023 0.145 218.1
2024 0.108 191.3
2025 0.066 111.5
2026 0.125 53.1
2027 0.145 29.9
2028 0.100 360.0
2029 0.075 283.7
2030 0.128 234.6


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



 
 


wds00279%2B2220c.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
00279+2220 FRV 1 2004 2 7 0.1 17.50   M8V+M9V 002755.93+221932.8
00279+2220 FRV 1 2010 24 60 0.1 17.50   M7.5+M8.0 NOD 002755.93+221932.8

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