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Doubles in session


Current system
09100-2845
B 179
HD 78921


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

62' : 09081-2941
LDS5698

72' : 09122-2951
SWR 68

77' : 09086-3000
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 (HD 78921)

 
 
09h 09m 57.24s -28° 45' 20.7" P.A. 113.00 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 112.9 P.A. Now (θ) 69.2°
Sep first 0.4 Sep last 0.126 Sep. Now (ρ) 0.092"
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
 
 
Name HD 78921 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
 
 
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 Notes ReferenceTok2019c
Equinox Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 169.5 0.534
2001 168.7 0.526
2002 167.8 0.518
2003 167.0 0.508
2004 166.1 0.497
2005 165.1 0.485
2006 164.1 0.472
2007 163.1 0.458
2008 161.9 0.442
2009 160.7 0.425
2010 159.4 0.407
2011 158.0 0.388
2012 156.4 0.367
2013 154.6 0.344
2014 152.5 0.321
2015 150.1 0.295
2016 147.3 0.268
2017 143.7 0.240
2018 139.3 0.211
2019 133.3 0.181
2020 125.0 0.151
2021 112.7 0.123
2022 94.3 0.101
2023 69.2 0.092
2024 43.1 0.098
2025 22.9 0.116
2026 8.7 0.138
2027 358.2 0.156
2028 349.5 0.167
2029 341.6 0.171
2030 333.7 0.168


 
 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 09100-2845 B 179 (HD 78921) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2019c St j Tokovinin, A., Mason, B.D., Mendez, R.A., Horch, E.P. & Briceno, C. 2019AJ....158...48T
Tok2019c +orb AJ 158, 48, 2019
 
 
DISCOVERER
 
 
idgroup discov author
1 B van den Bos, W.H.
 
 
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
09100-2845 B 179 2020 40 113 0.1 9.44 9.64 K0V O 090957.24-284520.7

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

 
 
WDS 09100-2845 B 179 (HD 78921) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 09100-2845 B 179 (HD 78921) : MEASURES
 
 
No records found.

 
 
WDS 09100-2845 (HD 78921) : VIRTUAL EYEPIECE
 
 

09100-2845 B 179A mag 9.44 Sp K0V 09100-2845 B 179B sep 0.1 P.A. 115.70 mag 9.64 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 09100-2845 (HD 78921) : ALADIN DSS IMAGE @ 09h 09m 57.24s -28° 45' 20.7"
 
 
 
 
WDS 09100-2845 B 179 (HD 78921) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

09100-2845 B 179 distance=0' 09092-2849 I 197 distance=11' 09091-2836 RST1417 distance=15' 09091-2833 KPP1059 distance=17' 09096-2829 B 178 distance=17' 09114-2858 RST1420 distance=24' 09106-2908 BRT2965 distance=25' 09082-2829 B 177AB distance=28' 09082-2829 B 177AB,C distance=28' 09106-2811 RST1419 distance=36' 09070-2847 LDS5697 distance=39' 09120-2814 TDS6389 distance=42' 09131-2814 TDS6398 distance=53' 09077-2800 RST1415 distance=55' 09114-2937 TDS6379 distance=56' 09081-2941 LDS5698 distance=62' 09122-2951 SWR 68 distance=72' 09086-3000 TOK 835 distance=77' 09137-2746 RST1422 distance=77' 09059-2747 RST1414 distance=80' 09043-2920 HJ 4168 distance=83' 09060-2738 TDS6315 distance=86' 09092-3013 HJ 2484 distance=89' 09030-2914 RST1413 distance=97' 09099-3022 H N 96AD distance=97' 09099-3022 H N 96A,BC distance=97' 09099-3022 B 1113BC distance=97' 09143-2727 LDS 259 distance=98' 09059-2720 B 176 distance=102' 09041-2951 KPP 748 distance=102' 09098-2701 RST1418 distance=105' 09177-2821 B 2676 distance=105' 09040-2956 TVB 210 distance=105' 09153-3006 KUI 119 distance=107' 09021-2802 TDS6258AB distance=112' 09021-2802 DAM1523AB,C distance=112' 09147-3021 KPP 189 distance=114' 09014-2819 HDS1310 distance=117' 09151-3019 LDS 261 distance=117' 09151-3022 DAW 131 distance=118' 09041-3020 TDS6282 distance=122' 09038-3018 RSS 187AB distance=122' 09146-3032 BRT2966 distance=123' 09160-2712 B 2205 distance=124' 09015-2742 BRT2963 distance=129' 09023-2724 B 173 distance=130' 09109-3055 LDS5700 distance=131' 09063-2643 SKF1885 distance=132' 09002-2928 LDS3846 distance=135' 09194-2943 RST1426 distance=138' 09179-3017 RST 389 distance=138' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 09100-2845 B 179 113 0.1
Show 09092-2849 I 197 59 1.9 11
Show 09091-2836 RST1417 343 2.1 15
Show 09091-2833 KPP1059 13 8.4 17
Show 09096-2829 B 178 93 0.3 17
Show 09114-2858 RST1420 124 1.2 24
Show 09106-2908 BRT2965 306 4.3 25
Show 09082-2829 B 177 AB 203 0.0 28
Show 09082-2829 B 177 AB,C 239 9.1 28
Show 09106-2811 RST1419 326 0.8 36
Show 09070-2847 LDS5697 151 223.0 39
Show 09120-2814 TDS6389 268 0.7 42
Show 09131-2814 TDS6398 207 1.8 53
Show 09077-2800 RST1415 181 0.6 55
Show 09114-2937 TDS6379 36 0.5 56
Show 09081-2941 LDS5698 62 246.0 62
Show 09122-2951 SWR 68 135 26.5 72
Show 09086-3000 TOK 835 52 1.7 77
Show 09137-2746 RST1422 83 0.7 77
Show 09059-2747 RST1414 224 0.8 80
Show 09043-2920 HJ 4168 254 9.2 83
Show 09060-2738 TDS6315 13 0.6 86
Show 09092-3013 HJ 2484 112 24.6 89
Show 09030-2914 RST1413 66 0.9 97
Show 09099-3022 H N 96 AD 344 38.9 97
Show 09099-3022 H N 96 A,BC 148 17.6 97
Show 09099-3022 B 1113 BC 85 0.2 97
Show 09143-2727 LDS 259 125 9.6 98
Show 09059-2720 B 176 63 2.9 102
Show 09041-2951 KPP 748 250 6.5 102
Show 09098-2701 RST1418 51 0.3 105
Show 09177-2821 B 2676 337 8.2 105
Show 09040-2956 TVB 210 337 12.5 105
Show 09153-3006 KUI 119 144 16.0 107
Show 09021-2802 TDS6258 AB 100 0.9 112
Show 09021-2802 DAM1523 AB,C 227 3.1 112
Show 09147-3021 KPP 189 161 3.3 114
Show 09014-2819 HDS1310 192 0.3 117
Show 09151-3019 LDS 261 15 4.1 117
Show 09151-3022 DAW 131 127 1.1 118
Show 09041-3020 TDS6282 5 0.7 122
Show 09038-3018 RSS 187 AB 54 11.2 122
Show 09146-3032 BRT2966 257 3.6 123
Show 09160-2712 B 2205 340 15.7 124
Show 09015-2742 BRT2963 207 7.4 129
Show 09023-2724 B 173 283 7.0 130
Show 09109-3055 LDS5700 254 292.2 131
Show 09063-2643 SKF1885 84 20.9 132
Show 09002-2928 LDS3846 204 138.3 135
Show 09194-2943 RST1426 148 6.5 138
Show 09179-3017 RST 389 355 3.3 138

 
 
WDS 09100-2845 : COMPONENTS
 
 
  A
B pa=115.7°
sep=0.11"
 
 
09100-2845 A
 
 
Componente originario normalizzato AB Name HD 78921 Coord arcsec 2000 090957.24-284520.7 Mag 9.44
Spectral class K0V (yellow-orange) PmRA -13.00 PmDE -77.0 SAO 177059
HIP 45003 Tycho2 6598-01373-1 HD 78921 CD CD-28 6981
CP CP-28 3635
Tycho2
Tycho2 6598-01373-1 Pflag RAmdeg 137.48849649 DEmdeg -28.75581064
PmRA -13.3 PmDE -76.9 E RAmdeg 8 E DEmdeg 9
E pmRA 1.5 E pmDE 1.8 EpRAm 1990.65 EpDEm 1990.83
Num 8 Q RAmdeg 0.8 Q DEmdeg 0.8 Q pmRA 0.8
Q pmDE 0.8 BTmag 9.785 E BTmag 0.021 VTmag 8.925
E VTmag 0.014 Prox 999 TYC T HIP 45003
CCDM AB RAdeg 137.48853194 DEdeg -28.75562528 EpRA 1990 1.56
EpDE 1990 1.34 E RAdeg 8.2 E DEdeg 9.4 Posflg P
Corr -0.1
SAO
SAO 177059 DelFlag RA1950 PmRA1950 -0.0003
DE1950 PmDE1950 -0.047 Vmag 8.3 SpType G5
Double code Source 24 CatNum 5857 DM CD-28 6981
DMcomp BDsup HD 78921 M HD 0
GC RA1950rad 2.39025424 DE1950rad -0.49829581 PmRA2000 0
PmDE2000 -0.044
Hipparcos
Catalog H HIP 45003 Proxy H RAhms 09 09 57.25
DEdms -28 45 20.0 Vmag 8.76 VarFlag R Vmag H
RAdeg 137.489 DEdeg -28.7556 AstroRef A Plx 15.24
CCDM 09100-2845 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 176 Rho 0.567 HD 78921 BD
CD CD-28 6981 CP CP-28 3635 Dm number -28 6981 VIred 0.83
SpType K0V R SpType Coord arcsec 2000 090957.25-284520.0
Hipparcos 2
HIP 45003 Sn 15 So 3 Nc 2
RArad 2.3996274648 DErad -0.5018791206 Plx 17.89 PmRA -10.97
PmDE -77.23 E RArad 1.14 E DErad 2.09 E Plx 2.07
E pmRA 1.24 E pmDE 2.45 Hpmag 8.8964 E Hpmag 0.0022
SHp 0.022 VA 0 BV 0.783 E BV 0.018
VI 0.82
CCDM
Ccdm 09100-2845 RComp Comp A Note1
Note2 Discov num DRAs -2.71 DDEs -20.4
R dRAs 41 Year Theta Rho
Obs 2 Vmag 9.4 Sp G5 PmNote *
PmRA -4 PmDE -47 Dm number -28 6981 Cat1 CD
Name2 177059 Cat2 SAO HD 78921 M HD
ADS BDS A 7223 M ADS BDS N IDS IDS 09057S2821A
HIC 45003
 
 
09100-2845 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 090957.25-284520.7 Mag 9.64 PmRA -13.00
PmDE -77.0 Calc delta mag 0.2 Calc coord yes
CCDM
Ccdm 09100-2845 RComp Comp B Note1 *
Note2 Discov num B 179 DRAs DDEs
R dRAs Year 1952 Theta 127 Rho 0.1
Obs 10 Vmag 9.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 7223 M ADS BDS N IDS IDS 09057S2821B
HIC 45003