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Doubles in session


Current system
13527-1843
WSI 78
DL Vir


Nearby doubles
9' : 13521-1846
UC 2629

14' : 13525-1830
GWP2114

27' : 13516-1904
GWP2107

27' : 13518-1819
GWP2108

34' : 13539-1910
HU 898

53' : 13505-1925
LTL 5

53' : 13509-1756
ARA 230

55' : 13496-1917
GWP2095

62' : 13529-1943
GWP2116

66' : 13481-1831
RST2873

67' : 13486-1810
GWP2092

69' : 13565-1759
LDS4420

73' : 13520-1955
HJ 2687

75' : 13475-1900
GWP2089

78' : 13581-1843
LDS 466

81' : 13564-1942
GWP2149

81' : 13576-1922
UC 2644

94' : 13461-1833
HU 473AB

95' : 13544-1711
OCC 856

100' : 13473-1740
GWP2087

103' : 13496-2016
ARA 693

106' : 14000-1859
GWP2165

108' : 14002-1855
KPP 301

110' : 13475-2004
TVB 264

112' : 13577-1717
WHC 12AB

114' : 13451-1806
RST2864



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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

13527-1843 WSI 78 (DL Vir)

 
 
13h 52m 38.84s -18° 42' 32.5" P.A. 132.00 sep 0.0 mag 7.40,8.20 Sp A3V+K1V dist. 218.82 pc (713.79 l.y.)
 
 
Coord 2000 13527-1843 Discov num WSI  78 Comp Coord arcsec 2000 13 52 38.84 -18 42 32.5
Date first 2008 Date last 2023 Obs 17
Pa first 101 Pa last 131.7 P.A. Now (θ) 156.5°
Sep first 0.0 Sep last 0.041 Sep. Now (ρ) 0.026"
Mag pri 7.40 Mag sec 8.20 delta mag (ΔM) 0.8 Spectral class A3V+K1V (white/yellow-orange)
Pri motion ra -049 Sec motion ra
Pri motion dec +006 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name DL Vir Constellation Virgo SAO 158210 HIP 67744
Tycho2 6140-00715-1 Gaia DR2 6293889335197400064 HD 120901 GC 18747
BD BD-17 3949 Distance 218.82 Distance ly 713.79
 
 
ORBITAL ELEMENTS
 
 
Period (P)6.489y Periastron (T)1981.962y Semi-major axis (a)0.035a
Eccentricity (e)0.651 Inclination (i)68.4° Longitude of periastron (ω)58.2°
Node (Ω)288° Notesn ReferenceUSN2019
Equinox2000 Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 202.8 0.016
2001 272.2 0.018
2002 103.2 0.025
2003 119.2 0.042
2004 129.9 0.041
2005 144.2 0.032
2006 173.7 0.020
2007 241.0 0.016
2008 6.4 0.005
2009 113.2 0.037
2010 124.6 0.042
2011 136.3 0.037
2012 155.8 0.026
2013 204.3 0.016
2014 273.5 0.018
2015 103.9 0.026
2016 119.4 0.042
2017 130.2 0.041
2018 144.6 0.032
2019 174.7 0.020
2020 242.6 0.016
2021 24.7 0.005
2022 113.5 0.037
2023 124.8 0.042
2024 136.6 0.037
2025 156.5 0.026
2026 206.0 0.016
2027 274.8 0.018
2028 104.5 0.026
2029 119.7 0.042
2030 130.4 0.040
2031 145.0 0.031
2032 175.8 0.020
2033 244.1 0.017
2034 41.0 0.005
2035 113.8 0.037
2036 125.1 0.042
2037 137.0 0.037
2038 157.1 0.025
2039 207.6 0.016
2040 276.2 0.017
2041 105.1 0.027
2042 119.9 0.042
2043 130.7 0.040
2044 145.4 0.031
2045 176.9 0.020
2046 245.6 0.017
2047 53.9 0.006
2048 114.1 0.038
2049 125.3 0.042
2050 137.3 0.036


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds13527-1843b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic