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Doubles in session


Current system
09100-2845
B 179


Nearby doubles
11' : 09092-2849
I 197

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KPP1059

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B 178

24' : 09114-2858
RST1420

25' : 09106-2908
BRT2965

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B 177AB

36' : 09106-2811
RST1419

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LDS5697

42' : 09120-2814
TDS6389

53' : 09131-2814
TDS6398

55' : 09077-2800
RST1415

56' : 09114-2937
TDS6379

58' : 09081-2941
LDS5698

72' : 09122-2951
SWR 68

77' : 09086-2960
TOK 835

77' : 09137-2746
RST1422

80' : 09059-2747
RST1414

83' : 09043-2920
HJ 4168

86' : 09060-2738
TDS6315

89' : 09092-3013
HJ 2484

97' : 09030-2914
RST1413

98' : 09143-2727
LDS 259

102' : 09059-2720
B 176

102' : 09041-2951
KPP 748

105' : 09098-2701
RST1418



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.

09100-2845 B   179

 
 
09h 09m 57.24s -28° 45' 20.7" P.A. 112.70 sep 0.1 mag 9.44,9.64 Sp K0V dist. 55.9 pc (182.35 l.y.)
 
 
Coord 2000
09100-2845
 Discov num
B   179
 Comp
Coord arcsec 2000
09 09 57.24 -28 45 20.7
Date first
1927
 Date last
2020
 Obs
40
Pa first
161
 Pa last
113
 P.A. Now (θ)
112.7°
Sep first
0.4
 Sep last
0.1
 Sep. Now (ρ)
0.12"
Mag pri
9.44
 Mag sec
9.64
 delta mag (ΔM)
0.2
 Spectral class
K0V (yellow-orange)
Pri motion ra
-013
 Sec motion ra
-013
Pri motion dec
-077
 Sec motion dec
-077
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
112.9
 Precise sep
0.126
 Constellation
Pyxis
 SAO
177059
HIP
45003
 Tycho2
6598-01373-1
 Gaia DR2
5636015416217477504
 HD
78921
ADS
7223
 CD
CD-28 6981
 CP
CP-28 3635
 Distance
55.9
Distance ly
182.35
 last precise pa
112.9
 last precise sep
0.126
 
 
ORBITAL ELEMENTS
 
 
Period (P)80.35y± 0.84 Periastron (T)2026.88y± 0.62 Semi-major axis (a)0.372a± 0.006
Eccentricity (e)0.562± 0.025 Inclination (i)116.3°± 1.3 Longitude of periastron (ω)158.5°± 3
Node (Ω)169.4°± 1.1 Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation2018
label rho theta
2000 0.534 169.5
2001 0.526 168.7
2002 0.518 167.8
2003 0.508 167.0
2004 0.497 166.1
2005 0.485 165.1
2006 0.472 164.1
2007 0.458 163.1
2008 0.442 161.9
2009 0.425 160.7
2010 0.407 159.4
2011 0.388 158.0
2012 0.367 156.4
2013 0.344 154.6
2014 0.321 152.5
2015 0.295 150.1
2016 0.268 147.3
2017 0.240 143.7
2018 0.211 139.3
2019 0.181 133.3
2020 0.151 125.0
2021 0.123 112.7
2022 0.101 94.3
2023 0.092 69.2
2024 0.098 43.1
2025 0.116 22.9
2026 0.138 8.7
2027 0.156 358.2
2028 0.167 349.5
2029 0.171 341.6
2030 0.168 333.7


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


 
  


wds09100-2845c.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
09100-2845 B 179 1998 29 349 0.4 9.44 9.64 K0V NOD 090957.24-284520.7
09100-2845 B 179 2009 30 160 0.4 9.44 9.64 K0V NOD 090957.24-284520.7
09100-2845 B 179 2010 31 159 0.4 9.44 9.64 K0V NOD 090957.24-284520.7
09100-2845 B 179 2011 32 158 0.4 9.44 9.64 K0V NOD 090957.24-284520.7
09100-2845 B 179 2013 33 155 0.3 9.44 9.64 K0V NOD 090957.24-284520.7
09100-2845 B 179 2015 34 148 0.3 9.44 9.64 K0V O 090957.24-284520.7
09100-2845 B 179 2016 35 144 0.2 9.44 9.64 K0V O 090957.24-284520.7
09100-2845 B 179 2018 37 139 0.2 9.44 9.64 K0V O 090957.24-284520.7
09100-2845 B 179 2019 38 132 0.2 9.44 9.64 K0V O 090957.24-284520.7

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