00210+6740 HJ 1018

 
 
00h 20m 57.23s +67 40' 03.0" P.A. 87.70 sep 1.6 mag 8.57,8.89 Sp G5 dist. 31.74 pc (103.54 l.y.)
 
 
Coord 2000
00210+6740
Discov num
HJ 1018
Comp
Coord arcsec 2000
00 20 57.23 +67 40 03.0
Date first
1828
Date last
2020
Obs
92
Pa first
84
Pa last
87
P.A. Now (θ)
87.7°
Sep first
1.5
Sep last
1.5
Sep. Now (ρ)
1.62"
Mag pri
8.57
Mag sec
8.89
delta mag (ΔM)
0.32
Spectral class
G5 (yellow)
Pri motion ra
+027
Sec motion ra
+027
Pri motion dec
+078
Sec motion dec
+078
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
87
Precise sep
1.529
Constellation
Hydra
SAO
11124
HIP
1674
Tycho2
4294-00406-1
Gaia DR2
528767648745379200
HD
1624
ADS
283
BD
BD+66 19
Distance
31.74
Distance ly
103.54
last precise pa
87
last precise sep
1.529
 
 
ORBITAL ELEMENTS
 
 
Period (P)154.2328y± 3.6474 Periastron (T)1942.7553y± 1.6671 Semi-major axis (a)0.97822a± 0.05546
Eccentricity (e)0.91379± 0.02389 Inclination (i)88.271°± 1.571 Longitude of periastron (ω)210.113°± 10.154
Node (Ω)86.735°± 1.129 Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation2015
label rho theta
2000 1.626 87.5
2001 1.629 87.5
2002 1.633 87.6
2003 1.635 87.6
2004 1.638 87.6
2005 1.639 87.6
2006 1.641 87.6
2007 1.642 87.6
2008 1.643 87.6
2009 1.643 87.6
2010 1.643 87.6
2011 1.642 87.6
2012 1.641 87.7
2013 1.640 87.7
2014 1.638 87.7
2015 1.636 87.7
2016 1.633 87.7
2017 1.630 87.7
2018 1.627 87.7
2019 1.623 87.7
2020 1.619 87.7
2021 1.615 87.7
2022 1.610 87.8
2023 1.605 87.8
2024 1.599 87.8
2025 1.593 87.8
2026 1.587 87.8
2027 1.580 87.8
2028 1.573 87.8
2029 1.565 87.8
2030 1.557 87.8


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



 
 


wds00210%2B6740b.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
00210+6740 HJ 1018 2006 87 88 1.6 8.57 8.89 G5 NOD 002057.23+674003.0
00210+6740 HJ 1018 2009 88 89 1.8 8.57 8.89 G5 NOD 002057.23+674003.0
00210+6740 HJ 1018 2014 88 86 1.7 8.57 8.89 G5 NO 002057.23+674003.0
00210+6740 HJ 1018 2015 89 88 1.7 8.57 8.89 G5 NO 002057.23+674003.0
00210+6740 HJ 1018 2016 92 89 1.7 8.57 8.89 G5 NO 002057.23+674003.0
00210+6740 HJ 1018 2020 90 87 1.5 8.57 8.89 G5 NO 002057.23+674003.0

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