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Doubles in session


Current system
00093+7943
STF 2


Nearby doubles
24' : 00163+7958
UC 345

29' : 00018+8003
LOC 127

33' : 00200+8000
HJL1002

39' : 00028+8017
STF3051

43' : 00247+7935
LOC 111

43' : 00101+7900
LOC 126

47' : 00246+8006
SKF2035AB

49' : 00119+7855
TDS1339

52' : 00151+7854
MLR 301

54' : 00244+7909
SKF2749

58' : 00030+7848
TDS1270

59' : 00137+8038
LDS1503

60' : 00059+7844
HDS 5

64' : 00077+7839
TDS1304

73' : 00085+7830
TDS1308

74' : 00210+8050
LOC 112

77' : 00282+8042
LDS1507

79' : 00245+8052
TDS1445

80' : 00125+7824
LOC 125

82' : 00033+7823
LOC 124

86' : 00005+7822
HEI 901

87' : 00224+8103
TDS1424

91' : 00081+7812
LDS1501

93' : 00028+7812
HU 799

93' : 00103+7810
MLR 370

95' : 00263+8108
LOC 114



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.

00093+7943 STF   2

 
 
00h 09m 20.18s +79° 42' 52.4" P.A. 14.30 sep 0.9 mag 6.68,6.89 Sp A4IV dist. 105.49 pc (344.11 l.y.)
 
 
Coord 2000
00093+7943
 Discov num
STF   2
 Comp
Coord arcsec 2000
00 09 20.18 +79 42 52.4
Date first
1828
 Date last
2019
 Obs
213
Pa first
343
 Pa last
15
 P.A. Now (θ)
14.3°
Sep first
0.8
 Sep last
0.9
 Sep. Now (ρ)
0.95"
Mag pri
6.68
 Mag sec
6.89
 delta mag (ΔM)
0.21
 Spectral class
A4IV (white)
Pri motion ra
+106
 Sec motion ra
+106
Pri motion dec
-033
 Sec motion dec
-033
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
14.6
 Precise sep
0.94
 Constellation
Hydra
 SAO
4048
HIP
760
 Tycho2
4500-01334-1
 Gaia DR2
565004017238715264
 HD
431
HR
20
 ADS
102
 BD
BD+78 1
 Distance
105.49
Distance ly
344.11
 last precise pa
14.6
 last precise sep
0.94
 
 
ORBITAL ELEMENTS
 
 
Period (P)540y Periastron (T)1887.5y Semi-major axis (a)0.995a
Eccentricity (e)0.715 Inclination (i)110.1° Longitude of periastron (ω)333.7°
Node (Ω)171.2° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.788 18.7
2001 0.796 18.5
2002 0.804 18.2
2003 0.812 18.0
2004 0.819 17.8
2005 0.827 17.5
2006 0.835 17.3
2007 0.842 17.1
2008 0.850 16.9
2009 0.857 16.6
2010 0.865 16.4
2011 0.872 16.2
2012 0.880 16.0
2013 0.887 15.8
2014 0.895 15.6
2015 0.902 15.4
2016 0.909 15.2
2017 0.916 15.0
2018 0.924 14.8
2019 0.931 14.7
2020 0.938 14.5
2021 0.945 14.3
2022 0.952 14.1
2023 0.959 13.9
2024 0.966 13.8
2025 0.973 13.6
2026 0.980 13.4
2027 0.987 13.3
2028 0.993 13.1
2029 1.000 13.0
2030 1.007 12.8


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds00093%2B7943a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
00093+7943 STF 2 2005 214 18 0.8 6.68 6.89 A4IV NOD 000920.18+794252.4
00093+7943 STF 2 2007 215 18 0.8 6.68 6.89 A4IV NOD 000920.18+794252.4
00093+7943 STF 2 2010 216 17 0.8 6.68 6.89 A4IV NOD 000920.18+794252.4
00093+7943 STF 2 2012 208 17 0.9 6.68 6.89 A4IV NOD 000920.18+794252.4
00093+7943 STF 2 2015 210 17 0.9 6.68 6.89 A4IV NO 000920.18+794252.4
00093+7943 STF 2 2018 211 17 0.9 6.68 6.89 A4IV NO 000920.18+794252.4
00093+7943 STF 2 2019 212 15 0.9 6.68 6.89 A4IV NO 000920.18+794252.4

If you need more information about this double, apply for a data request form to the WDS.