16212+2259 HU 481 (HD 147442)

 
 
16h 21m 14.74s +22° 59' 18.8" P.A. 233.00 sep 0.5 mag 8.21,10.04 Sp F8 dist. 66.18 pc (215.88 l.y.)
 
 
Coord 2000 16212+2259 Discov num HU  481 Comp Coord arcsec 2000 16 21 14.74 +22 59 18.8
Date first 1902 Date last 2023 Obs 89
Pa first 228 Pa last 233.2 P.A. Now (θ) 226.7°
Sep first 0.5 Sep last 0.517 Sep. Now (ρ) 0.496"
Mag pri 8.21 Mag sec 10.04 delta mag (ΔM) 1.83 Spectral class F8 (yellow-white)
Pri motion ra -008 Sec motion ra
Pri motion dec -040 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 147442 Constellation Hercules SAO 84317 HIP 80117
Tycho2 2043-00283-1 Gaia DR2 1301701718658018048 HD 147442 ADS 10017
BD BD+23 2924 Distance 66.18 Distance ly 215.88
 
 
ORBITAL ELEMENTS
 
 
Period (P)119.5y Periastron (T)1997.95y Semi-major axis (a)0.464a
Eccentricity (e)0.567 Inclination (i)146.8° Longitude of periastron (ω)160.5°
Node (Ω)172.6° Notesn ReferenceHrt2010a
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 346.8 0.208
2001 336.8 0.214
2002 327.3 0.221
2003 318.5 0.228
2004 310.1 0.236
2005 302.4 0.245
2006 295.2 0.254
2007 288.5 0.264
2008 282.4 0.276
2009 276.7 0.287
2010 271.5 0.300
2011 266.8 0.313
2012 262.4 0.326
2013 258.3 0.339
2014 254.6 0.353
2015 251.1 0.366
2016 247.9 0.380
2017 244.9 0.393
2018 242.1 0.407
2019 239.5 0.420
2020 237.0 0.433
2021 234.7 0.446
2022 232.6 0.459
2023 230.5 0.472
2024 228.5 0.484
2025 226.7 0.496
2026 224.9 0.508
2027 223.2 0.519
2028 221.6 0.530
2029 220.0 0.541
2030 218.5 0.552
2031 217.1 0.562
2032 215.7 0.572
2033 214.3 0.582
2034 213.0 0.591
2035 211.8 0.600
2036 210.6 0.609
2037 209.4 0.617
2038 208.2 0.625
2039 207.1 0.633
2040 206.0 0.640
2041 204.9 0.647
2042 203.8 0.654
2043 202.8 0.660
2044 201.8 0.666
2045 200.8 0.672
2046 199.8 0.677
2047 198.8 0.682
2048 197.9 0.687
2049 196.9 0.691
2050 196.0 0.695


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds16212%2B2259b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic