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Doubles in session


Current system
02374-5233
TOK 186 Aa,Ab


Nearby doubles
28' : 02387-5257
COO 14AB

43' : 02417-5216
KPP 90

44' : 02344-5306
TSN 125

44' : 02374-5149
KPP2808

49' : 02418-5300
JFF 1AB

53' : 02332-5156
HDS 333

62' : 02390-5133
UC 767

62' : 02442-5234
TOK 816

63' : 02438-5257
B 2560

81' : 02460-5252
KPP2473

84' : 02283-5221
RSS 57

95' : 02284-5320
NSC 13

95' : 02277-5201
BRT2019

97' : 02421-5359
UC 781

102' : 02479-5306
B 1925AB

106' : 02267-5156
TDS2254

108' : 02432-5407
HDS 356

115' : 02396-5425
HU 1350

116' : 02401-5040
UC 772

120' : 02462-5403
UC 804

125' : 02261-5124
SKF 947

130' : 02299-5044
HDS 324

130' : 02235-5208
I 1142

131' : 02317-5432
UC 751

131' : 02517-5234
HU 1562

137' : 02225-5237
TDS2233



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.

02374-5233 TOK 186 Aa,Ab

 
 
02h 37m 24.26s -52° 32' 35.1" P.A. 69.00 sep 0.1 mag 5.50,6.50 Sp A6V dist. 45.56 pc (148.62 l.y.)
 
 
Coord 2000 02374-5233 Discov num TOK 186 Comp Aa,Ab Coord arcsec 2000 02 37 24.26 -52 32 35.1
Date first 2011 Date last 2021 Obs 26
Pa first 60 Pa last 69 P.A. Now (θ) 351.5°
Sep first 0.1 Sep last 0.069 Sep. Now (ρ) 0.041"
Mag pri 5.50 Mag sec 6.50 delta mag (ΔM) 1 Spectral class A6V (white)
Pri motion ra +111 Sec motion ra
Pri motion dec +001 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
02374-5233 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 232835 02 37 24 -52 32 35 TOK 186 Aa,Ab 2021 26 69 0.1 5.50 6.50 1.00 Y <===
Show Eta Hor 232835 02 37 24 -52 32 35 EHR 2 AB 2008 3 232 4.9 4.50 14.00 9.50
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Horologium SAO 232835 HIP 12225 Tycho2 8484-01504-1
Gaia DR2 4745123853382686336 HD 16555 HR 778 GC 3166
CP CP-53 457 Bayer Eta Horologii Bayer name Eta Hor FK5 2182
Distance 45.56 Distance ly 148.62 Bayer greek η Hor
 
 
ORBITAL ELEMENTS
 
 
Period (P)3.171y Periastron (T)2011.523y Semi-major axis (a)0.079a
Eccentricity (e)0.065 Inclination (i)116.5° Longitude of periastron (ω)38°
Node (Ω)232.6° Notesn ReferenceTok2017c
Equinox2000 Last observation2017 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 54.8 0.082
2001 307.6 0.037
2002 214.2 0.062
2003 63.3 0.076
2004 346.4 0.040
2005 226.0 0.072
2006 74.2 0.064
2007 13.3 0.052
2008 235.8 0.075
2009 91.6 0.048
2010 29.1 0.066
2011 246.0 0.070
2012 124.1 0.035
2013 39.7 0.077
2014 259.1 0.058
2015 169.4 0.037
2016 48.1 0.082
2017 279.7 0.045
2018 199.6 0.050
2019 56.0 0.082
2020 313.6 0.037
2021 216.2 0.064
2022 64.7 0.075
2023 351.5 0.041
2024 227.5 0.073
2025 76.3 0.062
2026 16.2 0.054
2027 237.2 0.074
2028 95.3 0.046
2029 31.0 0.068
2030 247.7 0.068


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


 
  


wds02374-5233e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 02374-5233 TOK 186 Aa,Ab : NOTES
 
 
discov_num notes refcode
EHR 2 Primary is eta Hor. Physical/optical nature ambiguous. Ehr2010
TOK 186 Aa,Ab: The Marion et al. (2014) measure is in good agreement with the Mrn2014
Hartkopf et al. (2012) discovery observation, but hints at a Tok2014a
significantly eccentric and/or inclined orbit. A face-on, circular
orbit with a semimajor axis of 3.6au would have a period of ~3.7y,
which is in line with the 3.0y astrometric period found by Goldin &
Makarov (2007). Gln2007
 
 
REFERENCES
 
 
refcode metd author reference
Ehr2010 Ao j Ehrenreich, D., Lagrange, A.-M., Montagnier, G., Chauvin, G., Galland, F. 2010A&A...523A..73E
Ehr2010 Beuzit, J.-L., & Rameau. J.
Ehr2010 A&A 523, A73, 2010
Gln2007 orb - Goldin, A. & Makarov, V.V. 2007ApJS..173..137G
Gln2007 ApJS 173, 137, 2007
Gln2007 (Note: Astrometric orbits based on merged NDAC and FAST reductions of Hipparcos
Gln2007 data. Values of T0 are relative to 1991.25 = JD 2448349.0625)
Mrn2014 Kv j Marion, L., Absil, O., Ertel, S., Le Bouquin, J.-B., Augereau, J.-C., Blind, N., 2014A&A...570A.127M
Mrn2014 Defrere, D., Lebreton, J., & Milli, J.
Mrn2014 A&A 570, A127, 2014
Tok2014a orb j Tokovinin, A., Mason, B.D., & Hartkopf, W.I. 2014AJ....147..123T
Tok2014a +St AJ 147, 123, 2014 (some measures corrected in Tok2017b) 2017AJ....154..110T
Tok2017c orb - Tokovinin, A. 2017IAUDS.193....1T
Tok2017c Inf. Circ. 193, 1, 2017
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
02374-5233 TOK 186 Aa,Ab 2011 2 61 0.1 5.50 6.50 A6V N 023724.26-523235.1
02374-5233 TOK 186 Aa,Ab 2013 5 111 0.0 5.50 6.50 A6V N 023724.26-523235.1
02374-5233 TOK 186 Aa,Ab 2015 11 341 0.0 5.50 6.50 A6V NO 023724.26-523235.1
02374-5233 TOK 186 Aa,Ab 2017 17 226 0.1 5.50 6.50 A6V NO 023724.26-523235.1
02374-5233 TOK 186 Aa,Ab 2018 21 59 0.1 5.50 6.50 A6V NO 023724.26-523235.1
02374-5233 TOK 186 Aa,Ab 2019 23 339 0.0 5.50 6.50 A6V NO 023724.26-523235.1
02374-5233 TOK 186 Aa,Ab 2020 25 229 0.1 5.50 6.50 A6V NO 023724.26-523235.1
02374-5233 TOK 186 Aa,Ab 2021 26 69 0.1 5.50 6.50 A6V NO 023724.26-523235.1

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

 
 
WDS 02374-5233 TOK 186 Aa,Ab : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 02374-5233 TOK 186 Aa,Ab : MEASURES
 
 
No records found.

 
 
WDS 02374-5233 : VIRTUAL EYEPIECE
 
 

02374-5233 EHR 2A mag 4.5 Sp A6V 02374-5233 TOK 186Ab mag 6.5 02374-5233 EHR 2B sep 3.8 P.A. 218.30 mag 14 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 02374-5233 : ALADIN DSS IMAGE @ 02h 37m 24.26s -52° 32' 35.1"
 
 
 
 
WDS 02374-5233 TOK 186 Aa,Ab : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

02374-5233 TOK 186Aa,Ab distance=0' 02387-5257 COO 14AB distance=28' 02387-5257 SHY 424AC distance=28' 02417-5216 KPP 90 distance=43' 02344-5306 TSN 125 distance=44' 02374-5149 KPP2808 distance=44' 02418-5300 SYU 4Ba,Bb distance=49' 02418-5300 JFF 1AB distance=49' 02418-5300 TOK 690Aa,Ab distance=49' 02332-5156 HDS 333 distance=53' 02390-5133 UC 767 distance=62' 02442-5234 TOK 816 distance=62' 02438-5257 B 2560 distance=63' 02460-5252 KPP2473 distance=81' 02283-5221 RSS 57 distance=84' 02284-5320 NSC 13 distance=95' 02277-5201 BRT2019 distance=95' 02421-5359 UC 781 distance=97' 02479-5306 B 1925AB distance=102' 02479-5306 UC 811AC distance=102' 02267-5156 TDS2254 distance=106' 02432-5407 HDS 356 distance=108' 02396-5425 HU 1350 distance=115' 02401-5040 UC 772 distance=116' 02462-5403 UC 804 distance=120' 02261-5124 SKF 947 distance=125' 02299-5044 HDS 324 distance=130' 02235-5208 I 1142 distance=130' 02317-5432 UC 751 distance=131' 02517-5234 HU 1562 distance=131' 02225-5237 TDS2233 distance=137' 02239-5338 B 670 distance=138' 02389-5450 HJ 3520 distance=139' 02425-5452 KPP2432 distance=147' 02210-5242 FIN 81 distance=150' 02520-5347 BRT2020AB distance=153' 02306-5013 BRT 649 distance=153' 02225-5346 RST1238 distance=154' 02347-5000 SKF 948 distance=155' 02229-5106 EHR 1 distance=161' 02197-5218 RSS 56 distance=163' 02475-5452 UC 808 distance=166' 02495-5438 TDS2366 distance=166' 02518-5418 KPP 92 distance=166' 02468-5011 KPP3502AB distance=168' 02236-5433 HDS 310 distance=172' 02462-5002 UC 803 distance=172' 02326-5521 RST 52 distance=174' 02293-4954 NSN 184 distance=176' 02555-5340 TOI 847 distance=177' 02417-4939 RST5497 distance=179' 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 02374-5233 TOK 186 Aa,Ab 69 0.1
Show 02374-5233 EHR 2 AB 232 4.9
Show 02387-5257 COO 14 AB 128 8.7 28
Show 02387-5257 SHY 424 AC 75 218.2 28
Show 02417-5216 KPP 90 64 4.9 43
Show 02344-5306 TSN 125 68 0.1 44
Show 02374-5149 KPP2808 345 21.1 44
Show 02418-5300 SYU 4 Ba,Bb 133 0.1 49
Show 02418-5300 JFF 1 AB 11 22.2 49
Show 02418-5300 TOK 690 Aa,Ab 111 0.0 49
Show 02332-5156 HDS 333 262 0.5 53
Show 02390-5133 UC 767 19 20.2 62
Show 02442-5234 TOK 816 130 1.3 62
Show 02438-5257 B 2560 276 10.5 63
Show 02460-5252 KPP2473 234 22.1 81
Show 02283-5221 RSS 57 132 22.2 84
Show 02284-5320 NSC 13 185 6.0 95
Show 02277-5201 BRT2019 220 5.1 95
Show 02421-5359 UC 781 230 23.0 97
Show 02479-5306 B 1925 AB 2 14.7 102
Show 02479-5306 UC 811 AC 264 46.8 102
Show 02267-5156 TDS2254 330 0.5 106
Show 02432-5407 HDS 356 142 25.6 108
Show 02396-5425 HU 1350 40 0.9 115
Show 02401-5040 UC 772 101 7.9 116
Show 02462-5403 UC 804 165 8.4 120
Show 02261-5124 SKF 947 301 43.0 125
Show 02299-5044 HDS 324 42 0.4 130
Show 02235-5208 I 1142 40 3.7 130
Show 02317-5432 UC 751 290 10.2 131
Show 02517-5234 HU 1562 80 0.1 131
Show 02225-5237 TDS2233 228 0.6 137
Show 02239-5338 B 670 248 2.7 138
Show 02389-5450 HJ 3520 205 20.6 139
Show 02425-5452 KPP2432 338 21.3 147
Show 02210-5242 FIN 81 65 0.9 150
Show 02520-5347 BRT2020 AB 193 3.0 153
Show 02306-5013 BRT 649 330 3.4 153
Show 02225-5346 RST1238 112 0.6 154
Show 02347-5000 SKF 948 325 27.1 155
Show 02229-5106 EHR 1 154 2.3 161
Show 02197-5218 RSS 56 2 9.1 163
Show 02475-5452 UC 808 76 9.3 166
Show 02495-5438 TDS2366 70 0.8 166
Show 02518-5418 KPP 92 204 3.9 166
Show 02468-5011 KPP3502 AB 90 1.7 168
Show 02236-5433 HDS 310 21 0.3 172
Show 02462-5002 UC 803 354 10.7 172
Show 02326-5521 RST 52 287 1.6 174
Show 02293-4954 NSN 184 8 9.0 176
Show 02555-5340 TOI 847 317 1.2 177

 
 
WDS 02374-5233 : COMPONENTS
 
 
  A Ab
Ab pa=57.7°
sep=0.05"
 
B pa=218.3°
sep=3.83"
pa=218.5°
sep=3.88"
 
 
02374-5233 A
 
 
Name Eta Hor Coord arcsec 2000 023724.26-523235.1 Mag 4.5 Spectral class A6V (white)
PmRA 111.00 PmDE 1.0 SAO 232835 HIP 12225
Tycho2 8484-01504-1 HD 16555 HR 778 GC 3166
CP CP-53 457 Bayer Eta Horologii Bayer name Eta Hor FK5 2182
Tycho2
Tycho2 8484-01504-1 Pflag RAmdeg 39.35148879 DEmdeg -52.54312195
PmRA 95.8 PmDE -14.7 E RAmdeg 3 E DEmdeg 3
E pmRA 1.0 E pmDE 0.9 EpRAm 1991.38 EpDEm 1991.51
Num 17 Q RAmdeg 1.0 Q DEmdeg 1.3 Q pmRA 1.1
Q pmDE 1.6 BTmag 5.629 E BTmag 0.014 VTmag 5.328
E VTmag 0.009 Prox 999 TYC T HIP 12225
CCDM RAdeg 39.35111889 DEdeg -52.54308778 EpRA 1990 1.54
EpDE 1990 1.67 E RAdeg 3.4 E DEdeg 3.4 Posflg
Corr 0.2
SAO
SAO 232835 DelFlag RA1950 PmRA1950 0.0093
DE1950 PmDE1950 -0.013 Vmag 5.3 SpType A5
Double code Source 70 CatNum 3166 DM CP-53 457
DMcomp BDsup HD 16555 M HD 0
GC 3166 RA1950rad 0.67960887 DE1950rad -0.92081614 PmRA2000 0.0095
PmDE2000 -0.019
Hipparcos
Catalog H HIP 12225 Proxy RAhms 02 37 24.26
DEdms -52 32 35.1 Vmag 5.3 VarFlag R Vmag H
RAdeg 39.3511 DEdeg -52.5431 AstroRef Plx 22.49
CCDM N CCDM Nsys Ncomp 1
MultFlag X Source Qual S M HIP
Theta Rho HD 16555 BD
CD CP CP-53 457 Dm number -53 457 VIred 0.31
SpType A6V R SpType Coord arcsec 2000 023724.26-523235.1
Hipparcos 2
HIP 12225 Sn 1 So 2 Nc 1
RArad 0.6868063229 DErad -0.917049891 Plx 21.95 PmRA 112.7
PmDE 3.73 E RArad 0.84 E DErad 0.93 E Plx 1.1
E pmRA 0.98 E pmDE 1.02 Hpmag 5.3735 E Hpmag 0.0006
SHp 0.005 VA 0 BV 0.289 E BV 0.005
VI 0.33
 
 
02374-5233 Ab
 
 
Coord arcsec 2000 023724.26-523235.1 Mag 6.5 Calc delta mag 1 Calc coord yes
 
 
02374-5233 B
 
 
Coord arcsec 2000 023724.00-523238.1 Mag 14 Calc delta mag 8.5 Calc coord yes