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Doubles in session


Current system
21579-5500
FIN 307
Del Ind


Nearby doubles
19' : 21566-5514
TDT3251

24' : 21553-5505
RST5557

27' : 21599-5439
UC 4624

32' : 22017-5503
RST1115

39' : 21577-5538
TDT3262

51' : 21537-5535
TDT3221

67' : 21571-5606
UC 4610

75' : 21504-5424
COO 244

77' : 22036-5559
LDS 771

81' : 21530-5352
BRT2103

84' : 21484-5446
RST1109

90' : 22044-5351
HJ 5313

93' : 22009-5628
I 338

93' : 22062-5600
HDS3139

93' : 21472-5512
RST1108

94' : 21487-5411
TDT3167

95' : 22089-5511
NSC 30

98' : 22027-5333
LDS 770

100' : 22075-5405
UC 4658

102' : 21486-5358
UC 4571

104' : 21582-5316
TDT3264

108' : 22070-5347
HU 1542

109' : 21462-5419
LDS 754AB

112' : 22060-5628
I 381

114' : 22091-5402
UC 4665

117' : 22034-5647
SOZ 1AB



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.

21579-5500 FIN 307 (Del Ind)

 
 
21h 57m 55.03s -54° 59' 33.2" P.A. 222.00 sep 0.1 mag 4.80,5.96 Sp F0IV dist. 57.67 pc (188.12 l.y.)
 
 
Coord 2000 21579-5500 Discov num FIN 307 Comp Coord arcsec 2000 21 57 55.03 -54 59 33.2
Date first 1927 Date last 2020 Obs 317
Pa first 0 Pa last 222.3 P.A. Now (θ) 266.9°
Sep first 0.2 Sep last 0.052 Sep. Now (ρ) 0.17"
Mag pri 4.80 Mag sec 5.96 delta mag (ΔM) 1.16 Spectral class F0IV (yellow-white)
Pri motion ra +048 Sec motion ra
Pri motion dec -007 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Del Ind Constellation Indus SAO 247244 HIP 108431
Tycho2 8812-01257-1 Gaia DR2 6413081274731392256 HD 208450 HR 8368
GC 30720 CP CP-55 9733 Bayer Delta Indi Bayer name Del Ind
FK5 824 Distance 57.67 Distance ly 188.12 Bayer greek δ Ind
 
 
ORBITAL ELEMENTS
 
 
Period (P)12.237y± 0.08 Periastron (T)2007.518y± 0.48 Semi-major axis (a)0.176a± 0.004
Eccentricity (e)0.032± 0.032 Inclination (i)76.3°± 2 Longitude of periastron (ω)64.9°± 11
Node (Ω)90.8°± 2 Notesn ReferenceDoc2013d
Equinox2000 Last observation2009 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 277.4 0.163
2001 288.8 0.113
2002 328.5 0.050
2003 56.8 0.072
2004 78.7 0.135
2005 87.7 0.171
2006 95.1 0.165
2007 105.9 0.117
2008 144.2 0.050
2009 239.3 0.073
2010 260.1 0.139
2011 268.6 0.175
2012 275.6 0.170
2013 285.2 0.127
2014 312.2 0.063
2015 44.4 0.058
2016 75.6 0.121
2017 85.9 0.166
2018 93.3 0.170
2019 102.5 0.131
2020 127.9 0.064
2021 226.8 0.057
2022 257.2 0.125
2023 266.9 0.170
2024 273.9 0.175
2025 282.3 0.140
2026 301.7 0.078
2027 25.1 0.047
2028 71.6 0.107
2029 84.0 0.158
2030 91.5 0.173


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


 
  


wds21579-5500a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21579-5500 FIN 307 (Del Ind) : NOTES
 
 
discov_num notes refcode
FIN 307 del Ind.
Finsen called attention to quasi-periodic residuals in position
angle which neither of the alternative orbits explains.
Illustrative solutions with useable astrometric mass-ratios. Short-P
solution marginally better, but indeterminate with strong element-
correlations. Probably giant primary, more speckle-data needed. Sod1999
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 5.24 +/- 0.83, 3.26, and 1.58 Msun, respectively. Mlk2012
Docobo & Andrade (2013) derive a dynamical parallax of 22.71 +/- 0.69
mas and component masses 1.78 +/- 0.21 and 1.33 +/- 0.16 Msun. See
paper for extensive notes on this system. Doc2013d
 
 
REFERENCES
 
 
refcode metd author reference
Doc2013d orb - Docobo, J.A. & Andrade, M. 2013MNRAS.428..321D
Doc2013d MNRAS 428, 321, 2013
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Sod1999 orb - Soderhjelm, S. 1999A&A...341..121S
Sod1999 A&A 341, 121, 1999
 
 
DISCOVERER
 
 
idgroup discov author
1 FIN Finsen, W.S.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21579-5500 FIN 307 1991 308 80 0.1 4.80 5.96 F0IV NO 215755.03-545933.2
21579-5500 FIN 307 2008 316 50 0.1 4.80 5.96 F0IV NO 215755.03-545933.2
21579-5500 FIN 307 2009 317 75 0.1 4.80 5.96 F0IV NOD 215755.03-545933.2
21579-5500 FIN 307 2012 314 290 0.1 4.80 5.96 F0IV NO 215755.03-545933.2
21579-5500 FIN 307 2017 315 94 0.2 4.80 5.96 F0IV NO 215755.03-545933.2
21579-5500 FIN 307 2018 316 106 0.1 4.80 5.96 F0IV NO 215755.03-545933.2
21579-5500 FIN 307 2020 317 222 0.1 4.80 5.96 F0IV NO 215755.03-545933.2

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

 
 
WDS 21579-5500 FIN 307 (Del Ind) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21579-5500 FIN 307 (Del Ind) : MEASURES
 
 
No records found.

 
 
WDS 21579-5500 (Del Ind) : VIRTUAL EYEPIECE
 
 

21579-5500 FIN 307A mag 4.8 Sp F0IV 21579-5500 FIN 307B mag 5.96 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 21579-5500 (Del Ind) : ALADIN DSS IMAGE @ 21h 57m 55.03s -54° 59' 33.2"
 
 
 
 
WDS 21579-5500 FIN 307 (Del Ind) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21579-5500 FIN 307 distance=0' 21566-5514 TDT3251 distance=19' 21553-5505 RST5557 distance=24' 21599-5439 UC 4624 distance=27' 22017-5503 RST1115 distance=32' 21577-5538 TDT3262 distance=39' 21537-5535 TDT3221 distance=51' 21571-5606 UC 4610 distance=67' 21504-5424 COO 244 distance=75' 22036-5559 LDS 771 distance=77' 21530-5352 BRT2103 distance=81' 21484-5446 RST1109 distance=84' 22044-5351 HJ 5313 distance=90' 22009-5628 I 338 distance=93' 22062-5600 HDS3139 distance=93' 21472-5512 RST1108 distance=93' 21487-5411 TDT3167 distance=94' 22089-5511 NSC 30 distance=95' 22027-5333 LDS 770 distance=98' 22075-5405 UC 4658 distance=100' 21486-5358 UC 4571 distance=102' 21582-5316 TDT3264 distance=104' 22070-5347 HU 1542 distance=108' 21462-5419 LDS 754AB distance=109' 22060-5628 I 381 distance=112' 22091-5402 UC 4665 distance=114' 22034-5647 SOZ 1AB distance=117' 21565-5303 B 2498AB distance=118' 21565-5303 HJ 5302AC distance=118' 21585-5302 B 546 distance=119' 22016-5306 SKF 990 distance=119' 22034-5647 VLK 1Ba,Bb distance=120' 21506-5647 HU 1633 distance=124' 22087-5626 HU 1543 distance=126' 21445-5408 HJ 5290 distance=128' 21452-5346 TDT3138 distance=134' 22089-5638 B 551 distance=136' 22136-5528 HJ 5320 distance=138' 21562-5716 UC 4605 distance=138' 21419-5456 BRT3189 distance=138' 22099-5635 RST1123 distance=139' 22141-5527 RST2193 distance=141' 21418-5435 TDT3113 distance=142' 22022-5717 B 2899 distance=143' 21408-5535 TDT3103 distance=151' 22085-5707 CBL 186 distance=155' 21492-5243 RST1110 distance=157' 22156-5544 KPP 506 distance=158' 22045-5232 RST1119 distance=159' 21404-5402 TOI2203 distance=163' 22166-5543 SYO 2 distance=166' 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 21579-5500 FIN 307 222 0.1
Show 21566-5514 TDT3251 298 0.5 19
Show 21553-5505 RST5557 218 0.6 24
Show 21599-5439 UC 4624 336 23.9 27
Show 22017-5503 RST1115 190 1.5 32
Show 21577-5538 TDT3262 333 1.7 39
Show 21537-5535 TDT3221 100 0.7 51
Show 21571-5606 UC 4610 161 43.6 67
Show 21504-5424 COO 244 148 3.7 75
Show 22036-5559 LDS 771 192 41.1 77
Show 21530-5352 BRT2103 118 4.4 81
Show 21484-5446 RST1109 101 2.8 84
Show 22044-5351 HJ 5313 101 12.8 90
Show 22009-5628 I 338 289 0.9 93
Show 22062-5600 HDS3139 322 12.8 93
Show 21472-5512 RST1108 104 1.6 93
Show 21487-5411 TDT3167 275 0.6 94
Show 22089-5511 NSC 30 113 4.5 95
Show 22027-5333 LDS 770 7.9 98
Show 22075-5405 UC 4658 40 32.9 100
Show 21486-5358 UC 4571 174 53.8 102
Show 21582-5316 TDT3264 18 0.5 104
Show 22070-5347 HU 1542 117 5.8 108
Show 21462-5419 LDS 754 AB 270 32.7 109
Show 22060-5628 I 381 88 1.6 112
Show 22091-5402 UC 4665 236 11.2 114
Show 22034-5647 SOZ 1 AB 88 403.1 117
Show 21565-5303 B 2498 AB 251 2.4 118
Show 21565-5303 HJ 5302 AC 355 11.2 118
Show 21585-5302 B 546 342 0.6 119
Show 22016-5306 SKF 990 37 21.6 119
Show 22034-5647 VLK 1 Ba,Bb 127 0.5 120
Show 21506-5647 HU 1633 323 1.6 124
Show 22087-5626 HU 1543 324 1.5 126
Show 21445-5408 HJ 5290 291 11.1 128
Show 21452-5346 TDT3138 247 0.7 134
Show 22089-5638 B 551 173 3.1 136
Show 22136-5528 HJ 5320 287 18.3 138
Show 21562-5716 UC 4605 292 31.6 138
Show 21419-5456 BRT3189 293 4.5 138
Show 22099-5635 RST1123 20 0.8 139
Show 22141-5527 RST2193 34 0.8 141
Show 21418-5435 TDT3113 301 0.5 142
Show 22022-5717 B 2899 219 7.9 143
Show 21408-5535 TDT3103 68 0.5 151
Show 22085-5707 CBL 186 328 26.3 155
Show 21492-5243 RST1110 291 2.8 157
Show 22156-5544 KPP 506 70 3.8 158
Show 22045-5232 RST1119 122 0.7 159
Show 21404-5402 TOI2203 81 0.1 163
Show 22166-5543 SYO 2 12 16.7 166

 
 
WDS 21579-5500 : COMPONENTS
 
 
  A
B pa=207.6°
sep=0.04"
 
 
21579-5500 A
 
 
Componente originario normalizzato AB Name Del Ind Coord arcsec 2000 215755.03-545933.2 Mag 4.8
Spectral class F0IV (yellow-white) PmRA 48.00 PmDE -7.0 SAO 247244
HIP 108431 Tycho2 8812-01257-1 HD 208450 HR 8368
GC 30720 CP CP-55 9733 Bayer Delta Indi Bayer name Del Ind
FK5 824
Tycho2
Tycho2 8812-01257-1 Pflag RAmdeg 329.47949540 DEmdeg -54.99257315
PmRA 47.6 PmDE -2.6 E RAmdeg 3 E DEmdeg 3
E pmRA 0.8 E pmDE 0.8 EpRAm 1991.57 EpDEm 1991.44
Num 15 Q RAmdeg 1.0 Q DEmdeg 2.0 Q pmRA 1.0
Q pmDE 2.0 BTmag 4.738 E BTmag 0.014 VTmag 4.430
E VTmag 0.009 Prox 999 TYC T HIP 108431
CCDM AB RAdeg 329.47930639 DEdeg -54.99256722 EpRA 1990 1.81
EpDE 1990 1.69 E RAdeg 3.1 E DEdeg 3.2 Posflg P
Corr 0.1
SAO
SAO 247244 DelFlag RA1950 PmRA1950 0.0064
DE1950 PmDE1950 -0.005 Vmag 4.6 SpType F0
Double code Source 74 CatNum 824 DM CP-55 9733
DMcomp BDsup HD 208450 M HD 0
GC 30720 RA1950rad 5.73571643 DE1950rad -0.96396968 PmRA2000 0.0059
PmDE2000 -0.009
Hipparcos
Catalog H HIP 108431 Proxy H RAhms 21 57 55.03
DEdms -54 59 33.2 Vmag 4.4 VarFlag R Vmag G
RAdeg 329.479 DEdeg -54.9926 AstroRef * Plx 17.65
CCDM 21579-5500 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual D M HIP AB
Theta 69 Rho 0.104 HD 208450 BD
CD CP CP-55 9733 Dm number -55 9733 VIred 0.35
SpType F0IV R SpType Coord arcsec 2000 215755.03-545933.2
Hipparcos 2
HIP 108431 Sn 55 So 3 Nc 2
RArad 5.7504985214 DErad -0.9598013507 Plx 17.34 PmRA 41.94
PmDE -3.93 E RArad 0.32 E DErad 0.26 E Plx 0.48
E pmRA 0.4 E pmDE 0.28 Hpmag 4.4784 E Hpmag 0.0004
SHp 0.004 VA 0 BV 0.297 E BV 0.013
VI 0.35
CCDM
Ccdm 21579-5500 RComp Comp A Note1
Note2 Discov num DRAs 1.11 DDEs 26.4
R dRAs 10 Year Theta Rho
Obs 2 Vmag 5.3 Sp F0 PmNote *
PmRA 54 PmDE -5 Dm number -55 9733 Cat1 CPD
Name2 247244 Cat2 SAO HD 208450 M HD
ADS BDS M ADS BDS N IDS IDS 21511S5528A
HIC 108431
 
 
21579-5500 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 215755.03-545933.2 Mag 5.96 Calc delta mag 1.16
Calc coord yes
CCDM
Ccdm 21579-5500 RComp Comp B Note1 *
Note2 Discov num FIN 307 DRAs DDEs
R dRAs Year 1931 Theta Rho
Obs 99 Vmag 5.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 21511S5528B
HIC 108431