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Current system
16118+3626
WRH 21
HD 145849


Nearby doubles
20' : 16133+3617
KPP3988

24' : 16109+3604
HJ 583

35' : 16090+3629
BU 1087

38' : 16088+3635
DVG 1

39' : 16090+3643
KPP3984AB

60' : 16118+3725
HJ 260

64' : 16076+3547
HJ 259

65' : 16074+3548
ALI 370

67' : 16157+3538
HJ 585AB

73' : 16090+3730
TDS9774

75' : 16072+3536
KPP2512

79' : 16117+3507
GRV 924

80' : 16140+3510
POP 103

82' : 16103+3506
TDS9780

90' : 16044+3625
HDS2268

92' : 16193+3612
KPP3996

96' : 16071+3507
HJ 582

97' : 16120+3803
LDS4649

99' : 16089+3758
COU1276

102' : 16148+3801
LDS4657

102' : 16199+3600
COU 981

103' : 16033+3638
BAG 52

104' : 16118+3442
CVR 182

104' : 16073+3458
CBL 502

106' : 16205+3640
WAA 47

106' : 16202+3557
SLW1172



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

16118+3626 WRH 21 (HD 145849)

 
 
16h 11m 48.06s +36° 25' 30.6" P.A. 66.00 sep 0.1 mag 5.63, Sp K3III dist. 207.04 pc (675.36 l.y.)
 
 
Coord 2000 16118+3626 Discov num WRH  21 Comp Coord arcsec 2000 16 11 48.06 +36 25 30.6
Date first 1937 Date last 1963 Obs 3
Pa first 121 Pa last 65.8 P.A. Now (θ) 65.8°
Sep first 0.1 Sep last 0.09 Sep. Now (ρ) 0.09"
Mag pri 5.63 Mag sec delta mag (ΔM) Spectral class K3III (yellow-orange)
Pri motion ra -012 Sec motion ra
Pri motion dec -031 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 145849 Constellation Corona Borealis SAO 65132 HIP 79358
Tycho2 2579-02072-1 Gaia DR2 1330195012735726208 HD 145849 HR 6046
GC 21800 BD BD+36 2706 Distance 207.04 Distance ly 675.36
 
 
ORBITAL ELEMENTS
 
 
Period (P)2200.77d (6.03y) Periastron (T)50760.4d (1997.853y) Semi-major axis (a)9.69m± 0.85
Eccentricity (e)0.6797 Inclination (i)91.4°± 9.7 Longitude of periastron (ω)9.73°
Node (Ω)50.5°± 6.6 Notesn ReferenceTrr2007b
Equinox Last observation1993 Grade9(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 230.6 0.015
2001-01-01 230.2 0.016
2002-01-01 229.7 0.013
2003-01-01 228.4 0.006
2004-01-01 48.4 0.002
2005-01-01 231.2 0.010
2006-01-01 230.6 0.015
2007-01-01 230.2 0.016
2008-01-01 229.8 0.013
2009-01-01 228.5 0.006
2010-01-01 48.9 0.002
2011-01-01 231.3 0.010
2012-01-01 230.6 0.015
2013-01-01 230.2 0.016
2014-01-01 229.8 0.013
2015-01-01 228.6 0.006
2016-01-01 49.4 0.003
2017-01-01 231.3 0.010
2018-01-01 230.6 0.015
2019-01-01 230.2 0.016
2020-01-01 229.8 0.013
2021-01-01 228.7 0.006
2022-01-01 49.7 0.003
2023-01-01 231.3 0.009
2024-01-01 230.6 0.015
2025-01-01 230.2 0.016
2026-01-01 229.8 0.013
2027-01-01 228.7 0.007
2028-01-01 50.0 0.003
2029-01-01 231.3 0.009
2030-01-01 230.7 0.015
2031-01-01 230.3 0.016
2032-01-01 229.8 0.013
2033-01-01 228.8 0.007
2034-01-01 50.3 0.003
2035-01-01 231.4 0.009
2036-01-01 230.7 0.015
2037-01-01 230.3 0.016
2038-01-01 229.8 0.014
2039-01-01 228.8 0.007
2040-01-01 50.6 0.003
2041-01-01 231.4 0.009
2042-01-01 230.7 0.015
2043-01-01 230.3 0.016
2044-01-01 229.8 0.014
2045-01-01 228.9 0.007
2046-01-01 50.9 0.003
2047-01-01 231.4 0.009
2048-01-01 230.7 0.015
2049-01-01 230.3 0.016
2050-01-01 229.9 0.014


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds16118%2B3626s.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic