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Doubles in this session
 
 
Current system
09100-2845
B 179
 
 
Nearby doubles
11' : 09092-2849
I 197

15' : 09091-2836
RST1417

17' : 09091-2833
KPP1059

17' : 09096-2829
B 178

24' : 09114-2858
RST1420

25' : 09106-2908
BRT2965

28' : 09082-2829
B 177AB

36' : 09106-2811
RST1419

39' : 09070-2847
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' : 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

105' : 09177-2821
B 2676

 
 
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. 47.5 sep 0.04 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
2018
 Obs
37
Pa first
161
 Pa last
139
 P.A. Now (θ)
47.5°
Sep first
0.4
 Sep last
0.2
 Sep. Now (ρ)
0.04"
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
138.9
 Precise sep
0.209
 Constellation
Pyxis
 SAO
177059
HIP
45003
 Tycho2
6598-01373-1
 Gaia DR2
16217477504
 HD
78921
ADS
7223
 CD
CD-28 6981
 CP
CP-28 3635
 Distance
55.9
Distance ly
182.35
 last precise pa
138.9
 last precise sep
0.209
 
 
ORBITAL ELEMENTS
 
 
Period (P)83.79y Periastron (T)2019.3y Semi-major axis (a)0.47a
Eccentricity (e)0.816 Inclination (i)116.4° Longitude of periastron (ω)115.6°
Node (Ω)146.6° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2011
label rho theta
2000 0.525 170.2
2001 0.519 169.3
2002 0.512 168.4
2003 0.504 167.5
2004 0.494 166.5
2005 0.484 165.5
2006 0.472 164.4
2007 0.459 163.3
2008 0.444 162.1
2009 0.427 160.8
2010 0.409 159.4
2011 0.387 157.9
2012 0.363 156.1
2013 0.336 154.1
2014 0.304 151.8
2015 0.267 148.8
2016 0.223 144.7
2017 0.168 138.3
2018 0.100 124.0
2019 0.040 47.5
2020 0.096 334.9
2021 0.139 317.4
2022 0.160 306.5
2023 0.173 297.8
2024 0.183 290.1
2025 0.190 283.1
2026 0.197 276.6
2027 0.204 270.5
2028 0.211 264.8
2029 0.218 259.5
2030 0.226 254.5

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


wds09100-2845a.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

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