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Doubles in session


Current system
01262-6751
DON 17
HD 8944


Nearby doubles
14' : 01271-6738
UC 559

26' : 01257-6725
VOU 19

57' : 01174-6818
DON 16

59' : 01171-6819
DAM 395

59' : 01281-6848
KPP2545

64' : 01197-6843
NSN 171

74' : 01350-6845
UC 588

85' : 01158-6853
HJ 3423AB

87' : 01412-6741
LDS 56AB

90' : 01404-6714
COO 9AB

92' : 01409-6714
KPP1592

93' : 01349-6909
GLI 12

94' : 01104-6727
GKI 3

102' : 01171-6624
HJ 3426

105' : 01088-6718
DON 15

114' : 01072-6834
HDS 147

115' : 01220-6943
I 263

117' : 01329-6601
UC 579

118' : 01368-6932
VOU 17

121' : 01431-6641
CVR1732

128' : 01084-6636
KPP1808

130' : 01422-6621
UC 606

148' : 01106-6555
UC 511AB

151' : 01407-6959
KPP 582

159' : 01355-6522
DON 19

177' : 01448-6533
UC 620



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.

01262-6751 DON 17 (HD 8944)

 
 
01h 26m 09.45s -67° 50' 33.0" P.A. 292.00 sep 1.5 mag 8.81,9.81 Sp K0IV dist. 63.09 pc (205.8 l.y.)
 
 
Coord 2000 01262-6751 Discov num DON  17 Comp Coord arcsec 2000 01 26 09.45 -67 50 33.0
Date first 1928 Date last 2023 Obs 61
Pa first 357 Pa last 291.7 P.A. Now (θ) 291.4°
Sep first 0.7 Sep last 1.456 Sep. Now (ρ) 1.431"
Mag pri 8.81 Mag sec 9.81 delta mag (ΔM) 1 Spectral class K0IV (yellow-orange)
Pri motion ra +117 Sec motion ra +117
Pri motion dec -062 Sec motion dec -062
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 8944 Constellation Hydrus SAO 248383 HIP 6703
Tycho2 9136-00265-1 Gaia DR2 4692424016248469120 HD 8944 CD CD-68 58
CP CP-68 57 Distance 63.09 Distance ly 205.8
 
 
ORBITAL ELEMENTS
 
 
Period (P)374.1934y± 133.5931 Periastron (T)1948.7445y± 1.8322 Semi-major axis (a)1.15202a± 0.14288
Eccentricity (e)0.8491± 0.04483 Inclination (i)47.47°± 10.538 Longitude of periastron (ω)347.654°± 9.806
Node (Ω)134.941°± 6.087 Notes ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 285.0 1.125
2001 285.3 1.140
2002 285.7 1.156
2003 286.0 1.171
2004 286.3 1.186
2005 286.7 1.201
2006 287.0 1.215
2007 287.3 1.230
2008 287.6 1.244
2009 287.9 1.258
2010 288.2 1.272
2011 288.4 1.286
2012 288.7 1.300
2013 289.0 1.313
2014 289.2 1.327
2015 289.5 1.340
2016 289.7 1.353
2017 290.0 1.366
2018 290.2 1.379
2019 290.5 1.392
2020 290.7 1.404
2021 290.9 1.416
2022 291.2 1.429
2023 291.4 1.441
2024 291.6 1.453
2025 291.8 1.464
2026 292.0 1.476
2027 292.2 1.488
2028 292.4 1.499
2029 292.6 1.510
2030 292.8 1.521
2031 293.0 1.532
2032 293.2 1.543
2033 293.4 1.554
2034 293.6 1.564
2035 293.8 1.575
2036 294.0 1.585
2037 294.2 1.596
2038 294.3 1.606
2039 294.5 1.616
2040 294.7 1.626
2041 294.9 1.635
2042 295.0 1.645
2043 295.2 1.654
2044 295.4 1.664
2045 295.5 1.673
2046 295.7 1.682
2047 295.8 1.691
2048 296.0 1.700
2049 296.2 1.709
2050 296.3 1.718


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds01262-6751b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic