18015-1014 BU 47 (HD 164434)

 
 
18h 01m 30.85s -10° 14' 00.9" P.A. 89.00 sep 0.7 mag 8.74,9.59 Sp G0
 
 
Coord 2000 18015-1014 Discov num BU   47 Comp Coord arcsec 2000 18 01 30.85 -10 14 00.9
Date first 1871 Date last 2022 Obs 29
Pa first 270 Pa last 88.8 P.A. Now (θ) 88.8°
Sep first 1.3 Sep last 0.686 Sep. Now (ρ) 0.686"
Mag pri 8.74 Mag sec 9.59 delta mag (ΔM) 0.85 Spectral class G0 (yellow)
Pri motion ra +046 Sec motion ra +046
Pri motion dec -036 Sec motion dec -036
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 164434 Constellation Serpens Tycho2 5679-00367-1 Gaia DR2 4152221721459524736
HD 164434 ADS 10977
 
 
ORBITAL ELEMENTS
 
 
Period (P)403.9y Periastron (T)2013y Semi-major axis (a)1.209a
Eccentricity (e)0.478 Inclination (i)54° Longitude of periastron (ω)339.8°
Node (Ω)85.3° Notes ReferenceHrt2013c
Equinox2000 Last observation2009 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 44.2 0.499
2001 46.9 0.507
2002 49.5 0.515
2003 52.0 0.523
2004 54.4 0.532
2005 56.7 0.541
2006 59.0 0.549
2007 61.2 0.558
2008 63.3 0.567
2009 65.4 0.575
2010 67.4 0.583
2011 69.3 0.591
2012 71.2 0.599
2013 73.1 0.606
2014 74.9 0.613
2015 76.7 0.619
2016 78.4 0.625
2017 80.1 0.630
2018 81.8 0.635
2019 83.5 0.640
2020 85.1 0.643
2021 86.7 0.647
2022 88.3 0.650
2023 89.9 0.652
2024 91.5 0.654
2025 93.0 0.655
2026 94.6 0.656
2027 96.2 0.657
2028 97.7 0.657
2029 99.3 0.656
2030 100.9 0.656
2031 102.4 0.655
2032 104.0 0.653
2033 105.6 0.652
2034 107.2 0.650
2035 108.8 0.648
2036 110.4 0.646
2037 112.0 0.643
2038 113.6 0.641
2039 115.3 0.638
2040 116.9 0.635
2041 118.6 0.633
2042 120.3 0.630
2043 122.0 0.627
2044 123.7 0.625
2045 125.4 0.622
2046 127.2 0.620
2047 128.9 0.618
2048 130.7 0.616
2049 132.5 0.614
2050 134.3 0.612


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds18015-1014a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic