16325-1739 HDS 2338 (HD 148999)

 
 
16h 32m 31.77s -17° 38' 56.6" P.A. 122.00 sep 0.1 mag 10.78,11.50 Sp F8V dist. 214.13 pc (698.49 l.y.)
 
 
Coord 2000 16325-1739 Discov num HDS2338 Comp Coord arcsec 2000 16 32 31.77 -17 38 56.6
Date first 1991 Date last 2023 Obs 10
Pa first 313 Pa last 121.8 P.A. Now (θ) 121.8°
Sep first 0.2 Sep last 0.055 Sep. Now (ρ) 0.055"
Mag pri 10.78 Mag sec 11.50 delta mag (ΔM) 0.72 Spectral class F8V (yellow-white)
Pri motion ra +009 Sec motion ra
Pri motion dec -019 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 148999 Constellation Ophiuchus HIP 80998 Tycho2 6220-00887-1
Gaia DR2 4323736399997374720 HD 148999 BD BD-17 4595 Distance 214.13
Distance ly 698.49
 
 
ORBITAL ELEMENTS
 
 
Period (P)100y Periastron (T)2022.32y Semi-major axis (a)0.153a
Eccentricity (e)0.512 Inclination (i)65.4° Longitude of periastron (ω)299.6°
Node (Ω)144.3° Notes ReferenceTok2024b
Equinox2000 Last observation2024 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 317.6 0.172
2001 318.7 0.170
2002 319.7 0.167
2003 320.8 0.163
2004 322.0 0.159
2005 323.2 0.155
2006 324.5 0.150
2007 325.9 0.145
2008 327.4 0.139
2009 329.0 0.133
2010 330.8 0.125
2011 332.9 0.118
2012 335.2 0.109
2013 338.0 0.100
2014 341.4 0.090
2015 345.6 0.079
2016 351.2 0.068
2017 359.1 0.056
2018 10.9 0.046
2019 29.1 0.037
2020 55.2 0.032
2021 82.6 0.035
2022 103.1 0.043
2023 116.6 0.053
2024 125.7 0.063
2025 132.4 0.072
2026 137.6 0.080
2027 141.9 0.087
2028 145.7 0.092
2029 149.1 0.096
2030 152.3 0.098
2031 155.3 0.100
2032 158.3 0.101
2033 161.2 0.101
2034 164.2 0.101
2035 167.2 0.100
2036 170.2 0.099
2037 173.4 0.097
2038 176.6 0.096
2039 179.9 0.094
2040 183.4 0.092
2041 187.0 0.090
2042 190.8 0.089
2043 194.7 0.087
2044 198.7 0.086
2045 202.9 0.085
2046 207.1 0.084
2047 211.5 0.083
2048 215.9 0.083
2049 220.3 0.083
2050 224.7 0.083


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds16325-1739a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic