00271-0753 A   431AB

 
 
00h 27m 07.77s -07 52' 33.6" P.A. 283.20 sep 0.2 mag 8.84,8.95 Sp G5 dist. 55.49 pc (181.01 l.y.)
 
 
Coord 2000
00271-0753
Discov num
A   431
Comp
AB
Coord arcsec 2000
00 27 07.77 -07 52 33.6
Date first
1903
Date last
2019
Obs
79
Pa first
353
Pa last
288
P.A. Now (θ)
283.2°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.18"
Mag pri
8.84
Mag sec
8.95
delta mag (ΔM)
0.11
Spectral class
G5 (yellow)
Pri motion ra
-037
Sec motion ra
-037
Pri motion dec
+018
Sec motion dec
+018
Notes
O (Orbital solution)
This double is physical.
 
 
00271-0753 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 00 27 08 -07 52 34 A 431 AB 2019 79 283 0.2 8.84 8.95 0.11 Y <===
Show 00 27 08 -07 52 34 SKF 1423 AB,C 2015 7 318 110.3 8.21 14.07 5.86
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
288.4
Precise sep
0.178
Constellation
Hydra
HIP
2143
Tycho2
5262-00207-1
Gaia DR2
2430329616926916480
HD
2333
ADS
363
BD
BD-08 65
Distance
55.49
Distance ly
181.01
last precise pa
288.4
last precise sep
0.178
 
 
ORBITAL ELEMENTS
 
 
Period (P)53.56y Periastron (T)2003.58y Semi-major axis (a)0.364a
Eccentricity (e)0.644 Inclination (i)109° Longitude of periastron (ω)293°
Node (Ω)25.5° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2013
label rho theta
2000 0.216 199.5
2001 0.161 193.2
2002 0.096 179.0
2003 0.044 115.6
2004 0.091 46.8
2005 0.147 30.6
2006 0.182 22.5
2007 0.200 16.5
2008 0.208 11.3
2009 0.208 6.2
2010 0.205 1.0
2011 0.199 355.6
2012 0.192 349.8
2013 0.185 343.5
2014 0.178 336.7
2015 0.172 329.5
2016 0.168 321.8
2017 0.166 313.8
2018 0.166 305.7
2019 0.169 297.8
2020 0.174 290.3
2021 0.181 283.2
2022 0.190 276.8
2023 0.200 270.9
2024 0.212 265.7
2025 0.224 261.0
2026 0.237 256.8
2027 0.250 253.1
2028 0.263 249.7
2029 0.277 246.7
2030 0.290 243.9


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



 
 


wds00271-0753b.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
00271-0753 A 431 AB 2011 75 175 0.2 8.84 8.95 G5 NOD 002707.77-075233.6
00271-0753 A 431 AB 2013 76 158 0.2 8.84 8.95 G5 NO 002707.77-075233.6
00271-0753 A 431 AB 2014 77 147 0.2 8.84 8.95 G5 O 002707.77-075233.6
00271-0753 A 431 AB 2017 78 124 0.2 8.84 8.95 G5 O 002707.77-075233.6
00271-0753 A 431 AB 2019 79 288 0.2 8.84 8.95 G5 O 002707.77-075233.6

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