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Doubles in session


Current system
17031-5314
HDS 2412 Aa,Ab
Eps2 Ara


Nearby doubles
17' : 17047-5306
I 1309

38' : 17059-5342
KPP 389

38' : 16589-5312
WIS 307

39' : 17056-5346
RST3064

50' : 17074-5345
RST3067

57' : 16593-5230
RST3058

60' : 16573-5344
JNN 318AB

70' : 17098-5240
B 1845

70' : 17107-5300
NSN 374

76' : 17061-5203
RST1932

78' : 16551-5343
TDT 141

78' : 17097-5224
R 290

80' : 16579-5210
BRT2091

84' : 17043-5152
HDS2416

84' : 16584-5203
CPO 504

86' : 17001-5436
HDO 262

89' : 17097-5420
HJ 4917

89' : 17123-5245
B 1850

91' : 16533-5334
RST3047

93' : 17134-5306
B 2406

95' : 17036-5448
WFC 184

95' : 17133-5340
FIN 52

97' : 16574-5153
CPO9229AB

97' : 16548-5417
RST3055

102' : 16568-5151
RST 888

104' : 16556-5434
RST3056AB



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.

17031-5314 HDS 2412 Aa,Ab (Eps2 Ara)

 
 
17h 03m 08.76s -53° 14' 13.1" P.A. 151.00 sep 0.7 mag 5.44,8.65 Sp F5V dist. 27.23 pc (88.82 l.y.)
 
 
Coord 2000 17031-5314 Discov num HDS2412 Comp Aa,Ab Coord arcsec 2000 17 03 08.76 -53 14 13.1
Date first 1991 Date last 2021 Obs 29
Pa first 109 Pa last 151.3 P.A. Now (θ) 151.3°
Sep first 0.6 Sep last 0.678 Sep. Now (ρ) 0.678"
Mag pri 5.44 Mag sec 8.65 delta mag (ΔM) 3.21 Spectral class F5V (yellow-white)
Pri motion ra -017 Sec motion ra
Pri motion dec -118 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
17031-5314 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Eps2 Ara 244388 17 03 09 -53 14 13 HDS 2412 Aa,Ab 2021 29 151 0.7 5.44 8.65 3.21 Y <===
Show 244388 17 03 09 -53 14 13 HDO 263 AB 1999 2 18 46.1 5.33 13.85 8.52
Show 244388 17 03 09 -53 14 13 SKF 103 AC 2015 3 258 113.6 5.33 13.48 8.15
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Eps2 Ara Constellation Ara SAO 244388 HIP 83431
Tycho2 8726-02209-1 Gaia DR2 5923907314622859520 HD 153580 HR 6314
GC 22956 GL NN 3985 CP CP-53 8316 Bayer Epsilon 2 Arae
Bayer name Eps2 Ara Distance 27.23 Distance ly 88.82 Bayer greek ε2 Ara
 
 
ORBITAL ELEMENTS
 
 
Period (P)41.32y Periastron (T)1999.45y Semi-major axis (a)0.589a
Eccentricity (e)0.622 Inclination (i)133.8° Longitude of periastron (ω)94.1°
Node (Ω)73.6° Notesn ReferenceCve2013b
Equinox2000 Last observation2012 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 304.1 0.180
2001 270.1 0.270
2002 252.9 0.350
2003 241.5 0.411
2004 232.9 0.457
2005 225.6 0.493
2006 219.3 0.522
2007 213.5 0.546
2008 208.2 0.565
2009 203.3 0.582
2010 198.5 0.596
2011 194.0 0.608
2012 189.6 0.618
2013 185.4 0.627
2014 181.3 0.634
2015 177.3 0.641
2016 173.3 0.647
2017 169.4 0.652
2018 165.6 0.656
2019 161.8 0.660
2020 158.1 0.663
2021 154.4 0.665
2022 150.7 0.666
2023 147.0 0.666
2024 143.3 0.665
2025 139.6 0.664
2026 135.9 0.660
2027 132.1 0.656
2028 128.2 0.650
2029 124.3 0.641
2030 120.2 0.631


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


 
  


wds17031-5314a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 17031-5314 HDS 2412 Aa,Ab (Eps2 Ara) : NOTES
 
 
discov_num notes refcode
HDO 263 eps 2 Ara. Duplicity doubtful.
SKF 103 Identified as a double but not measured by Wegner. Wgn1973
AC: GJ 2125. C is DA3.2, mass 0.65. Mass(A)=1.41 (Holberg et al. 2013) Hbg2013
 
 
REFERENCES
 
 
refcode metd author reference
Cve2013b orb - Cvetkovic, Z. 2013IAUDS.181....1C
Cve2013b Inf. Circ. 181, 1, 2013
Hbg2013 not - Holberg, J. B., Oswalt, T. D., & Sion, E. M. 2013MNRAS.435.2077H
Hbg2013 MNRAS 435, 2077, 2013
Wgn1973 - Wegner, G. 1973MNRAS.165..271W
Wgn1973 MNRAS 165, 271, 1973
 
 
DISCOVERER
 
 
idgroup discov author
1 HDO Harvard Obs.
10 HDS Hipparcos Double Star (from additional DD list)
10 SKF Skiff, B.A.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17031-5314 HDS2412 Aa,Ab 1991 1 109 0.6 5.44 8.65 F6V D 170308.71-531411.9
17031-5314 HDS2412 Aa,Ab 2009 5 202 0.6 5.44 8.65 F6V D 170308.71-531411.9
17031-5314 HDS2412 Aa,Ab 2012 8 188 0.6 5.44 8.65 F6V N D 170308.71-531411.9
17031-5314 HDS2412 Aa,Ab 2013 10 182 0.6 5.44 8.65 F5V NO 170308.76-531413.1
17031-5314 HDS2412 Aa,Ab 2015 11 175 0.6 5.44 8.65 F5V NO 170308.76-531413.1
17031-5314 HDS2412 Aa,Ab 2017 17 167 0.7 5.44 8.65 F5V NO 170308.76-531413.1
17031-5314 HDS2412 Aa,Ab 2018 21 164 0.7 5.44 8.65 F5V NO 170308.76-531413.1
17031-5314 HDS2412 Aa,Ab 2019 24 160 0.7 5.44 8.65 F5V NO 170308.76-531413.1
17031-5314 HDS2412 Aa,Ab 2020 25 157 0.7 5.44 8.65 F5V NO 170308.76-531413.1
17031-5314 HDS2412 Aa,Ab 2021 29 151 0.7 5.44 8.65 F5V NO 170308.76-531413.1

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

 
 
WDS 17031-5314 HDS 2412 Aa,Ab (Eps2 Ara) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 17031-5314 HDS 2412 Aa,Ab (Eps2 Ara) : MEASURES
 
 
No records found.

 
 
WDS 17031-5314 (Eps2 Ara) : VIRTUAL EYEPIECE
 
 

17031-5314 HDO 263A mag 5.33 Sp F5V 17031-5314 HDS2412Ab sep 0.6 P.A. 161.90 mag 8.65 17031-5314 HDO 263B sep 44.7 P.A. 10.80 mag 13.85 17031-5314 SKF 103C sep 70.6 P.A. 250.30 mag 13.48 Sp DA3.2 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 17031-5314 (Eps2 Ara) : ALADIN DSS IMAGE @ 17h 03m 08.76s -53° 14' 13.1"
 
 
 
 
WDS 17031-5314 HDS 2412 Aa,Ab (Eps2 Ara) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

17031-5314 HDS2412Aa,Ab distance=0' 17047-5306 I 1309 distance=17' 17059-5342 KPP 389 distance=38' 16589-5312 WIS 307 distance=38' 17056-5346 RST3064 distance=39' 17074-5345 RST3067 distance=50' 16593-5230 RST3058 distance=57' 16573-5344 JNN 318AB distance=60' 16573-5344 JNN 318AC distance=60' 16573-5344 SYU 11Aa,Ab distance=60' 17098-5240 B 1845 distance=70' 17107-5300 NSN 374 distance=70' 17061-5203 RST1932 distance=76' 16551-5343 TDT 141 distance=78' 17097-5224 R 290 distance=78' 16579-5210 BRT2091 distance=80' 17043-5152 HDS2416 distance=84' 16584-5203 CPO 504 distance=84' 17001-5436 HDO 262 distance=86' 17097-5420 HJ 4917 distance=89' 17123-5245 B 1850 distance=89' 16533-5334 RST3047 distance=91' 17134-5306 B 2406 distance=93' 17036-5448 WFC 184 distance=95' 17133-5340 FIN 52 distance=95' 16574-5153 HDS2397Aa,Ab distance=97' 16574-5153 CPO9229AB distance=97' 16574-5153 CPO9229AC distance=97' 16574-5153 CPO9229AD distance=97' 16548-5417 RST3055 distance=97' 16568-5151 RST 888 distance=102' 16556-5434 RST3056AB distance=104' 16556-5434 BVD 119AB,C distance=104' 17061-5133 BRT 944 distance=105' 17112-5156 RST3073 distance=108' 17026-5504 HDS2411Aa,Ab distance=111' 17026-5504 HJ 4905AB distance=111' 16538-5201 TDT 134 distance=113' 17050-5122 RST5596 distance=113' 17140-5217 B 1851 distance=115' 17094-5134 BRT 948 distance=116' 17137-5425 R 294 distance=118' 17125-5152 RST5597BC distance=119' 17125-5152 CPO 515AB distance=119' 16547-5447 TDT 138 distance=120' 17149-5218 B 1852 distance=121' 16556-5458 BRT2580 distance=122' 17034-5112 RST1928 distance=123' 17024-5111 I 1308 distance=124' 16491-5303 RST3041 distance=127' 17018-5108 I 1306 distance=127' 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 17031-5314 HDS2412 Aa,Ab 151 0.7
Show 17031-5314 HDO 263 AB 18 46.1
Show 17031-5314 SKF 103 AC 258 113.6
Show 17047-5306 I 1309 307 2.8 17
Show 17059-5342 KPP 389 317 3.7 38
Show 16589-5312 WIS 307 124 85.4 38
Show 17056-5346 RST3064 136 0.2 39
Show 17074-5345 RST3067 60 4.1 50
Show 16593-5230 RST3058 244 0.8 57
Show 16573-5344 JNN 318 AB 102 3.2 60
Show 16573-5344 JNN 318 AC 298 3.5 60
Show 16573-5344 SYU 11 Aa,Ab 0.1 60
Show 17098-5240 B 1845 143 0.7 70
Show 17107-5300 NSN 374 343 1.2 70
Show 17061-5203 RST1932 219 1.4 76
Show 16551-5343 TDT 141 47 0.6 78
Show 17097-5224 R 290 119 9.6 78
Show 16579-5210 BRT2091 3 4.4 80
Show 17043-5152 HDS2416 258 5.6 84
Show 16584-5203 CPO 504 139 8.0 84
Show 17001-5436 HDO 262 51 25.2 86
Show 17097-5420 HJ 4917 35 15.1 89
Show 17123-5245 B 1850 216 5.0 89
Show 16533-5334 RST3047 105 1.6 91
Show 17134-5306 B 2406 84 8.0 93
Show 17036-5448 WFC 184 142 14.2 95
Show 17133-5340 FIN 52 124 5.1 95
Show 16574-5153 HDS2397 Aa,Ab 273 0.4 97
Show 16574-5153 CPO9229 AB 50 4.6 97
Show 16574-5153 CPO9229 AC 78 7.4 97
Show 16574-5153 CPO9229 AD 316 6.7 97
Show 16548-5417 RST3055 31 1.4 97
Show 16568-5151 RST 888 336 0.5 102
Show 16556-5434 RST3056 AB 69 2.1 104
Show 16556-5434 BVD 119 AB,C 353 27.1 104
Show 17061-5133 BRT 944 225 5.8 105
Show 17112-5156 RST3073 294 0.3 108
Show 17026-5504 HDS2411 Aa,Ab 9 0.2 111
Show 17026-5504 HJ 4905 AB 54 39.5 111
Show 16538-5201 TDT 134 350 10.2 113
Show 17050-5122 RST5596 103 5.3 113
Show 17140-5217 B 1851 166 0.7 115
Show 17094-5134 BRT 948 44 4.6 116
Show 17137-5425 R 294 116 14.4 118
Show 17125-5152 RST5597 BC 351 1.9 119
Show 17125-5152 CPO 515 AB 218 10.3 119
Show 16547-5447 TDT 138 285 0.6 120
Show 17149-5218 B 1852 128 1.5 121
Show 16556-5458 BRT2580 105 5.6 122
Show 17034-5112 RST1928 48 2.4 123
Show 17024-5111 I 1308 343 1.8 124

 
 
WDS 17031-5314 : COMPONENTS
 
 
  A Ab B
Ab pa=161.9°
sep=0.63"
 
B pa=10.8°
sep=44.72"
pa=10.4°
sep=45.27"
 
C pa=250.3°
sep=70.64"
pa=250.8°
sep=70.62"
pa=227.9°
sep=100.96"
 
 
17031-5314 A
 
 
Coord arcsec 2000 170308.76-531413.1 Mag 5.33 Spectral class F5V (yellow-white) PmRA -17.00
PmDE -118.0 SAO 244388 HIP 83431 Tycho2 8726-02209-1
HD 153580 HR 6314 GC 22956 CP CP-53 8316
Bayer Epsilon 2 Bayer name Eps2
Tycho2
Tycho2 8726-02209-1 Pflag RAmdeg 255.78626437 DEmdeg -53.23699418
PmRA -8.0 PmDE -152.4 E RAmdeg 4 E DEmdeg 4
E pmRA 3.9 E pmDE 3.7 EpRAm 1991.63 EpDEm 1991.35
Num 4 Q RAmdeg 1.0 Q DEmdeg 1.5 Q pmRA 0.9
Q pmDE 1.5 BTmag 5.842 E BTmag 0.014 VTmag 5.333
E VTmag 0.009 Prox 999 TYC T HIP 83431
CCDM AC RAdeg 255.78629528 DEdeg -53.23662833 EpRA 1990 1.64
EpDE 1990 1.36 E RAdeg 3.5 E DEdeg 3.7 Posflg P
Corr 0.2
SAO
SAO 244388 DelFlag RA1950 PmRA1950 -0.0001
DE1950 PmDE1950 -0.143 Vmag 5.4 SpType F8
Double code Source 70 CatNum 22956 DM CP-53 8316
DMcomp BDsup HD 153580 M HD 0
GC 22956 RA1950rad 4.44685139 DE1950rad -0.92789006 PmRA2000 -0.0004
PmDE2000 -0.144
Hipparcos
Catalog H HIP 83431 Proxy H RAhms 17 03 08.71
DEdms -53 14 11.9 Vmag 5.27 VarFlag R Vmag H
RAdeg 255.786 DEdeg -53.2366 AstroRef A Plx 37.97
CCDM 17031-5314 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AC
Theta 109 Rho 0.588 HD 153580 BD
CD CP CP-53 8316 Dm number -53 8316 VIred 0.55
SpType F6V R SpType Coord arcsec 2000 170308.71-531411.9
Hipparcos 2
HIP 83431 Sn 17 So 3 Nc 2
RArad 4.4643129342 DErad -0.9291544207 Plx 36.73 PmRA 0.15
PmDE -165.2 E RArad 0.59 E DErad 0.41 E Plx 0.63
E pmRA 0.63 E pmDE 0.47 Hpmag 5.3839 E Hpmag 0.0008
SHp 0.005 VA 0 BV 0.498 E BV 0.005
VI 0.57
CCDM
Ccdm 17031-5314 RComp Comp A Note1
Note2 Discov num DRAs 2.70 DDEs -13.3
R dRAs 82 Year Theta Rho
Obs 3 Vmag 5.4 Sp F5 PmNote *
PmRA -1 PmDE -165 Dm number -53 8316 Cat1 CPD
Name2 244388 Cat2 SAO HD 153580 M HD
ADS BDS M ADS BDS N IDS IDS 16552S5305A
HIC 83431
 
 
17031-5314 Ab
 
 
Coord arcsec 2000 170308.78-531413.7 Mag 8.65 Calc delta mag 3.21 Calc coord yes
 
 
17031-5314 B
 
 
Coord arcsec 2000 170309.69-531329.2 Mag 13.85 PmRA 13.00 PmDE 7.0
Calc delta mag 8.41 Calc coord yes
CCDM
Ccdm 17031-5314 RComp Comp B Note1
Note2 Discov num HDO 263 DRAs DDEs
R dRAs Year Theta 020 Rho 25.0
Obs Vmag 13.0 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 16552S5305B
HIC
 
 
17031-5314 C
 
 
Coord arcsec 2000 170301.35-531436.9 Mag 13.48 Spectral class DA3.2 (white dwarf) PmRA -5.00
PmDE -153.0 Calc delta mag 8.04 Calc coord yes
CCDM
Ccdm 17031-5314 RComp Comp C Note1
Note2 Discov num HDS DRAs 2.75 DDEs -13.0
R dRAs 82 Year 1991 Theta 109 Rho 0.6
Obs 1 Vmag 8.6 Sp PmNote
PmRA -17 PmDE -118 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 83431