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Current system
09320-0111
CHR 174
Tau2 Hya


Nearby doubles
27' : 09317-0138
GWP1191

28' : 09303-0122
SMH 13

30' : 09304-0101
J 1550

31' : 09301-0124
RST4912

45' : 09290-0115
A 1763

45' : 09349-0123
A 1986

49' : 09291-0132
BAL 518

54' : 09355-0113
LAS 28

57' : 09355-0134
TDS6669

65' : 09314-0215
J 2069

84' : 09314-0012
BVD 77

85' : 09300-0011
GRV1030

90' : 09261-0111
J 3291

100' : 09298-0245
UC 1802

103' : 09292+0024
BAL1151

103' : 09271-0002
GWP1180

105' : 09291-0246
HJ 1167

107' : 09341-0253
TVB 222

112' : 09276-0241
UC 1793

112' : 09280-0024
CVR1224

113' : 09383-0211
A 1987

117' : 09370-0239
TDS 544

121' : 09243-0143
LDS3887

122' : 09296-0307
BU 591

124' : 09336+0050
FMR 210

127' : 09379-0019
A 2558



Selections
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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.

09320-0111 CHR 174 (Tau2 Hya)

 
 
09h 31m 58.93s -01° 11' 04.8" P.A. 357.00 sep 0.0 mag 5.10,5.70 Sp A3V dist. 158.73 pc (517.78 l.y.)
 
 
Coord 2000 09320-0111 Discov num CHR 174 Comp Coord arcsec 2000 09 31 58.93 -01 11 04.8
Date first 1988 Date last 2021 Obs 18
Pa first 209 Pa last 357.3 P.A. Now (θ) 246.8°
Sep first 0.0 Sep last 0.02 Sep. Now (ρ) 0.042"
Mag pri 5.10 Mag sec 5.70 delta mag (ΔM) 0.6 Spectral class A3V (white)
Pri motion ra -016 Sec motion ra
Pri motion dec -008 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Tau2 Hya Constellation Hydra SAO 136932 HIP 46776
Tycho2 4894-02528-1 Gaia DR2 3839656786454467072 HD 82446 HR 3787
GC 13153 BD BD-00 2211 Bayer Tau 2 Hydrae Bayer name Tau2 Hya
Flamsteed 32 Hydrae Flamsteed name 32 Hya Distance 158.73 Distance ly 517.78
Bayer greek τ2 Hya
 
 
ORBITAL ELEMENTS
 
 
Period (P)6.021y± 0.03 Periastron (T)2015.055y± 0.026 Semi-major axis (a)0.032a± 0.001
Eccentricity (e)0.466± 0.012 Inclination (i)170.2°± 11.7 Longitude of periastron (ω)123.7°± 71.5
Node (Ω)162°± 71.8 Notesn ReferenceTok2021f
Equinox Last observation2021 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 218.0 0.046
2001 192.0 0.043
2002 153.7 0.031
2003 40.3 0.017
2004 284.8 0.031
2005 244.9 0.042
2006 218.5 0.046
2007 192.6 0.043
2008 154.9 0.032
2009 44.3 0.017
2010 286.1 0.030
2011 245.6 0.042
2012 219.0 0.046
2013 193.2 0.043
2014 156.0 0.032
2015 48.2 0.017
2016 287.3 0.030
2017 246.2 0.042
2018 219.5 0.046
2019 193.8 0.043
2020 157.1 0.032
2021 52.0 0.017
2022 288.6 0.030
2023 246.8 0.042
2024 220.1 0.046
2025 194.4 0.044
2026 158.1 0.033
2027 55.9 0.017
2028 289.9 0.029
2029 247.5 0.042
2030 220.6 0.046


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


 
  


wds09320-0111b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 09320-0111 CHR 174 (Tau2 Hya) : NOTES
 
 
discov_num notes refcode
CHR 174 tau 2 Hya = 32 Hya. A spectroscopic binary, now probably resolved.
Abt & Biggs (1972) note variable RV. AbH1972
 
 
REFERENCES
 
 
refcode metd author reference
AbH1972 - Abt. H.A. & Biggs, E.S. 1972bsrv.book.....A
AbH1972 Bibliography of Stellar Radial Velocities
Tok2021f orb - Tokovinin, A. 2021IAUDS.204....1T
Tok2021f Inf. Circ. 204, 1, 2021
 
 
DISCOVERER
 
 
idgroup discov author
1 CHR Center for High Ang. Res. Astronomy (speckle interferometry systems)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
09320-0111 CHR 174 1994 2 206 0.1 4.57   A3V N 093158.93-011104.8
09320-0111 CHR 174 2014 3 139 0.0 5.10 5.70 A3V N 093158.93-011104.8
09320-0111 CHR 174 2015 5 112 0.0 5.10 5.70 A3V N 093158.93-011104.8
09320-0111 CHR 174 2017 10 239 0.0 5.10 5.70 A3V NO 093158.93-011104.8
09320-0111 CHR 174 2018 12 196 0.0 5.10 5.70 A3V NO 093158.93-011104.8
09320-0111 CHR 174 2019 16 161 0.0 5.10 5.70 A3V NO 093158.93-011104.8
09320-0111 CHR 174 2021 18 357 0.0 5.10 5.70 A3V NO 093158.93-011104.8

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

 
 
WDS 09320-0111 CHR 174 (Tau2 Hya) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 09320-0111 CHR 174 (Tau2 Hya) : MEASURES
 
 
No records found.

 
 
WDS 09320-0111 (Tau2 Hya) : VIRTUAL EYEPIECE
 
 

09320-0111 CHR 174A mag 5.1 Sp A3V 09320-0111 CHR 174B mag 5.7 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 09320-0111 (Tau2 Hya) : ALADIN DSS IMAGE @ 09h 31m 58.93s -01° 11' 04.8"
 
 
 
 
WDS 09320-0111 CHR 174 (Tau2 Hya) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

09320-0111 CHR 174 distance=0' 09317-0138 GWP1191 distance=27' 09303-0122 SMH 13 distance=28' 09304-0101 J 1550 distance=30' 09301-0124 RST4912 distance=31' 09290-0115 A 1763 distance=45' 09349-0123 A 1986 distance=45' 09291-0132 BAL 518 distance=49' 09355-0113 LAS 28 distance=54' 09355-0134 TDS6669 distance=57' 09314-0215 J 2069 distance=65' 09314-0012 BVD 77 distance=84' 09300-0011 GRV1030 distance=85' 09261-0111 J 3291 distance=90' 09298-0245 UC 1802 distance=100' 09292+0024 BAL1151 distance=103' 09271-0002 GWP1180 distance=103' 09291-0246 HJ 1167 distance=105' 09341-0253 TVB 222 distance=107' 09276-0241 UC 1793 distance=112' 09280-0024 CVR1224 distance=112' 09383-0211 A 1987 distance=113' 09370-0239 TDS 544 distance=117' 09243-0143 LDS3887 distance=121' 09296-0307 BU 591 distance=122' 09336+0050 FMR 210 distance=124' 09379-0019 A 2558 distance=127' 09401-0145 BAL 519 distance=128' 09261-0021 SLW 355 distance=128' 09371+0030 LDS 910AB distance=128' 09235-0107 A 1761 distance=128' 09328-0056 SLW 365 distance=129' 09265-0255 J 425AB distance=129' 09265-0255 J 425AC distance=129' 09265-0255 J 425AD distance=129' 09265-0255 J 425BC distance=129' 09265-0255 J 425BD distance=129' 09310-0319 TDS 540 distance=130' 09363-0042 TDS6679 distance=131' 09303-0058 GWP1188 distance=132' 09294-0317 GWP1184 distance=132' 09255+0009 LDS5703 distance=132' 09240-0221 HJ 812 distance=140' 09311-0330 KPP2758 distance=140' 09226-0101 DAM1608 distance=142' 09225-0105 A 1760 distance=142' 09385-0256 TOK 128 distance=143' 09392-0247 CUD 5 distance=146' 09269-0315 A 128 distance=146' 09297+0112 RST5331 distance=148' 09277+0105 J 387 distance=148' 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 09320-0111 CHR 174 357 0.0
Show 09317-0138 GWP1191 342 36.1 27
Show 09303-0122 SMH 13 18 6.1 28
Show 09304-0101 J 1550 41 7.9 30
Show 09301-0124 RST4912 341 1.7 31
Show 09290-0115 A 1763 124 1.4 45
Show 09349-0123 A 1986 178 0.2 45
Show 09291-0132 BAL 518 50 79.8 49
Show 09355-0113 LAS 28 57 10.6 54
Show 09355-0134 TDS6669 268 0.5 57
Show 09314-0215 J 2069 257 82.1 65
Show 09314-0012 BVD 77 276 41.8 84
Show 09300-0011 GRV1030 311 17.7 85
Show 09261-0111 J 3291 206 6.2 90
Show 09298-0245 UC 1802 48 25.9 100
Show 09292+0024 BAL1151 194 2.3 103
Show 09271-0002 GWP1180 96 18.1 103
Show 09291-0246 HJ 1167 4 65.7 105
Show 09341-0253 TVB 222 211 2.4 107
Show 09276-0241 UC 1793 133 40.5 112
Show 09280-0024 CVR1224 1 3.9 112
Show 09383-0211 A 1987 72 0.5 113
Show 09370-0239 TDS 544 334 0.8 117
Show 09243-0143 LDS3887 241 5.3 121
Show 09296-0307 BU 591 29 1.0 122
Show 09336+0050 FMR 210 41 3.1 124
Show 09379-0019 A 2558 327 1.8 127
Show 09401-0145 BAL 519 210 14.3 128
Show 09261-0021 SLW 355 233 10.8 128
Show 09371+0030 LDS 910 AB 102 28.5 128
Show 09235-0107 A 1761 217 1.0 128
Show 09328-0056 SLW 365 196 33.0 129
Show 09265-0255 J 425 AB 245 2.1 129
Show 09265-0255 J 425 AC 267 6.3 129
Show 09265-0255 J 425 AD 190 7.7 129
Show 09265-0255 J 425 BC 276 4.6 129
Show 09265-0255 J 425 BD 175 6.7 129
Show 09310-0319 TDS 540 346 1.8 130
Show 09363-0042 TDS6679 138 0.5 131
Show 09303-0058 GWP1188 317 227.3 132
Show 09294-0317 GWP1184 323 36.3 132
Show 09255+0009 LDS5703 27 6.6 132
Show 09240-0221 HJ 812 61 12.0 140
Show 09311-0330 KPP2758 76 43.8 140
Show 09226-0101 DAM1608 358 1.8 142
Show 09225-0105 A 1760 141 1.8 142
Show 09385-0256 TOK 128 239 5.4 143
Show 09392-0247 CUD 5 210 1.8 146
Show 09269-0315 A 128 262 1.3 146
Show 09297+0112 RST5331 99 0.3 148
Show 09277+0105 J 387 4.9 148

 
 
WDS 09320-0111 : COMPONENTS
 
 
  A
B pa=357.3°
sep=0.02"
 
 
09320-0111 A
 
 
Componente originario normalizzato AB Name Tau2 Hya Coord arcsec 2000 093158.93-011104.8 Mag 5.1
Spectral class A3V (white) PmRA -16.00 PmDE -8.0 SAO 136932
HIP 46776 Tycho2 4894-02528-1 HD 82446 HR 3787
GC 13153 BD BD-00 2211 Bayer Tau 2 Hydrae Bayer name Tau2 Hya
Flamsteed 32 Hydrae Flamsteed name 32 Hya
Tycho2
Tycho2 4894-02528-1 Pflag RAmdeg 142.99552229 DEmdeg -1.18466713
PmRA -16.8 PmDE -5.6 E RAmdeg 3 E DEmdeg 4
E pmRA 1.0 E pmDE 0.9 EpRAm 1991.56 EpDEm 1991.34
Num 16 Q RAmdeg 1.3 Q DEmdeg 1.8 Q pmRA 1.2
Q pmDE 1.9 BTmag 4.676 E BTmag 0.014 VTmag 4.562
E VTmag 0.009 Prox 999 TYC T HIP 46776
CCDM RAdeg 142.99556083 DEdeg -1.18465417 EpRA 1990 1.73
EpDE 1990 1.65 E RAdeg 3.3 E DEdeg 3.6 Posflg
Corr 0.2
SAO
SAO 136932 DelFlag RA1950 PmRA1950 -0.001
DE1950 PmDE1950 -0.015 Vmag 4.5 SpType A3
Double code Source 70 CatNum 13153 DM BD-00 2211
DMcomp BDsup HD 82446 M HD 0
GC 13153 RA1950rad 2.48462069 DE1950rad -0.01681326 PmRA2000 -0.0008
PmDE2000 -0.011
Hipparcos
Catalog H HIP 46776 Proxy RAhms 09 31 58.93
DEdms -01 11 04.8 Vmag 4.54 VarFlag 1 R Vmag H
RAdeg 142.996 DEdeg -1.18465 AstroRef Plx 7.11
CCDM N CCDM Nsys Ncomp 1
MultFlag G Source Qual M HIP
Theta Rho HD 82446 BD BD-00 2211
CD CP Dm number -00 2211 VIred 0.16
SpType A3V R SpType Coord arcsec 2000 093158.93-011104.8
Hipparcos 2
HIP 46776 Sn 1 So 1 Nc 1
RArad 2.495743355 DErad -0.0206761154 Plx 6.3 PmRA -12.6
PmDE -3.99 E RArad 0.67 E DErad 0.37 E Plx 0.72
E pmRA 0.82 E pmDE 0.37 Hpmag 4.5926 E Hpmag 0.0008
SHp 0.01 VA 2 BV 0.109 E BV 0.018
VI 0.16
CCDM
Ccdm 09320-0111 RComp Comp A Note1
Note2 Discov num DRAs -1.08 DDEs -5.9
R dRAs 81 Year Theta Rho
Obs 2 Vmag 4.6 Sp A3 PmNote @
PmRA -21 PmDE -22 Dm number -00 2211 Cat1 BD
Name2 -00 1403 Cat2 AGK2/3 HD 82446 M HD
ADS BDS M ADS BDS N IDS W IDS 09320-0111A
HIC 46776
 
 
09320-0111 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 093158.93-011104.8 Mag 5.7 Calc delta mag 0.6
Calc coord yes
CCDM
Ccdm 09320-0111 RComp Comp B Note1
Note2 Discov num CHR 174 DRAs DDEs
R dRAs Year 1988 Theta 209 Rho 0.0
Obs 1 Vmag Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS W IDS 09320-0111B
HIC 46776