02415-1506 HDS 351 (HD 16826)

 
 
02h 41m 30.12s -15° 06' 01.9" P.A. 20.00 sep 0.0 mag 7.77,8.65 Sp F7V dist. 78.62 pc (256.46 l.y.)
 
 
Coord 2000 02415-1506 Discov num HDS 351 Comp Coord arcsec 2000 02 41 30.12 -15 06 01.9
Date first 1991 Date last 2021 Obs 22
Pa first 5 Pa last 19.5 P.A. Now (θ) 19.5°
Sep first 0.1 Sep last 0.024 Sep. Now (ρ) 0.024"
Mag pri 7.77 Mag sec 8.65 delta mag (ΔM) 0.88 Spectral class F7V (yellow-white)
Pri motion ra +091 Sec motion ra
Pri motion dec -066 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 16826 Constellation Cetus SAO 148549 HIP 12554
Tycho2 5863-00755-1 Gaia DR2 5157838496488670080 HD 16826 BD BD-15 477
Distance 78.62 Distance ly 256.46
 
 
ORBITAL ELEMENTS
 
 
Period (P)28.21y± 0.6 Periastron (T)1993.61y± 0.53 Semi-major axis (a)0.168a± 0.004
Eccentricity (e)0.674± 0.029 Inclination (i)87.7°± 0.7 Longitude of periastron (ω)150.8°± 3.2
Node (Ω)204.2°± 0.6 Notes ReferenceTok2021c
Equinox2000 Last observation2021 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 200.2 0.110
2001 201.0 0.135
2002 201.4 0.159
2003 201.8 0.180
2004 202.1 0.198
2005 202.4 0.214
2006 202.6 0.228
2007 202.8 0.239
2008 203.0 0.248
2009 203.1 0.254
2010 203.3 0.257
2011 203.5 0.257
2012 203.6 0.255
2013 203.8 0.249
2014 204.0 0.239
2015 204.2 0.225
2016 204.4 0.207
2017 204.7 0.183
2018 205.1 0.152
2019 205.7 0.114
2020 207.1 0.064
2021 276.0 0.003
2022 23.7 0.054
2023 26.9 0.053
2024 35.0 0.024
2025 174.2 0.012
2026 195.4 0.044
2027 198.7 0.075
2028 200.0 0.104
2029 200.8 0.130
2030 201.4 0.154


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



 
 


wds02415-1506a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic