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Current system
05074+1839
A 3010 AB


Nearby doubles
41' : 05078+1759
CRC 48

44' : 05048+1815
OCC 27

48' : 05063+1755
BRT2322

49' : 05066+1752
BRT2323

59' : 05053+1929
NSN 23

61' : 05116+1829
LDS3643

62' : 05093+1934
LDS6168

64' : 05043+1924
NSN 554

69' : 05039+1752
GWP 640

71' : 05076+1949
LDS5661

72' : 05124+1824
KPP3599

75' : 05055+1948
STT 95

76' : 05088+1952
OCC 636

81' : 05131+1830
COU 369

83' : 05030+1931
A 2428AB

85' : 05040+1730
OCC 966

85' : 05134+1832
J 1043

87' : 05134+1824
TDS3115

89' : 05059+2005
BRT2320

91' : 05079+2009
OCC 904

92' : 05111+1724
OCC 577

94' : 05036+1956
LDS5651

100' : 05034+1718
XMI 7AB

102' : 05032+2000
LDS5648

107' : 05002+1811
GIC 53

107' : 05078+2025
OCC 644



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Triple Systems
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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

05074+1839 A 3010 AB

 
 
05h 07m 27.00s +18° 38' 42.1" P.A. 243.00 sep 0.1 mag 5.80,5.80 Sp G1V dist. 15.43 pc (50.33 l.y.)
 
 
Coord 2000 05074+1839 Discov num A  3010 Comp AB Coord arcsec 2000 05 07 27.00 +18 38 42.1
Date first 1912 Date last 1988 Obs 18
Pa first 6 Pa last 242.7 P.A. Now (θ) 242.7°
Sep first 0.1 Sep last 0.099 Sep. Now (ρ) 0.099"
Mag pri 5.80 Mag sec 5.80 delta mag (ΔM) 0 Spectral class G1V (yellow)
Pri motion ra +533 Sec motion ra
Pri motion dec +019 Sec motion dec
Notes N X (See Notes, Dubious double)
Nature of this double is uncertain.
 
 
05074+1839 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 94332 05 07 27 +18 38 42 A 3010 AB 1988 18 243 0.1 5.80 5.80 0.00 Y <===
Show 104 Tau 94332 05 07 27 +18 38 42 HLA 4 AC 2016 1 309 6.3 3.20
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Taurus SAO 94332 HIP 23835 Tycho2 1286-00403-1
HD 32923 HR 1656 GC 6255 ADS 3701
GL Gl 188A BD BD+18 779 Flamsteed 104 Tauri Flamsteed name 104 Tau
Distance 15.43 Distance ly 50.33
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
Identifier05074+1839 A 3010
coord_arcsec_2000050727.00+183842.1
Period (P)1.19y Periastron (T)1911.37y Semi-major axis (a)0.18a
Eccentricity (e)0.9 Inclination (i)73° Longitude of periastron (ω)90.3°
Node (Ω)122.3° Notesn ReferenceEgg1956
Equinox Last observation1953 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 30.2 0.100
2001 6.5 0.100
2002 342.6 0.097
2003 213.3 0.005
2004 83.0 0.099
2005 59.8 0.102
2006 36.4 0.100
2007 12.7 0.100
2008 349.1 0.099
2009 319.5 0.070
2010 89.7 0.094
2011 65.8 0.102
2012 42.7 0.100
2013 18.9 0.100
2014 355.3 0.100
2015 329.5 0.086
2016 97.4 0.085
2017 71.8 0.102
2018 48.8 0.101
2019 25.2 0.100
2020 1.6 0.100
2021 337.1 0.094
2022 108.1 0.065
2023 77.9 0.100
2024 54.9 0.101
2025 31.5 0.100
2026 7.7 0.100
2027 343.9 0.098
2028 301.1 0.032
2029 84.2 0.098
2030 61.0 0.102


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


 
  


wds05074%2B1839a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 05074+1839 A 3010 AB : NOTES
 
 
discov_num notes refcode
A 3010 104 Tau.
Two orbit solutions (Eggen 1956). Observations of this close pair Egg1956
are so scattered that both orbits are highly conjectural.
A measure on 1977.9196 was incorrectly attributed to ADS 3701 in
McAlister & Hendry (1982); it actually belongs to ADS 4020. McA1982b
Visual and speckle observations at 0".1 sep ruled out as spurious by
constant RV (Duquennoy & Mayor 1991). Duq1991
Precise velocities are stable to better than 100 m/s over 388 days, Nid2002
so there are no "hot jupiters" and a 2-year period is excluded with Tok2010b
high confidence.
104 Tau is a G4V dwarf at 16 pc resolved into equal components at 0.1"
by R. Aitken in 1912. The WDS contains 16 resolutions of this pair. A__1927a
Apart from Aitken himself, it has been resolved on multiple occasions
by R.H. Wilson in 1934-1971, by W. Finsen (1953-1955) and by others, WRH1941a
although in other instances those observers found it to be single. Fin1953d
The measures suggest a near-circular orbit seen face-on with a semi-
major axis on the order of 0.1" or 1.5 au. Assuming a mass sum of 2
Msun, the orbital period should be around 1.3 yr; in fact, two orbits
with periods 1.19 yr and 2.38 yr were published by Eggen (1956). This Egg1956
binary should be an easy target for speckle interferometry at 4-m
telescopes. It was observed 10 times from 1976.9 to 1980.7 with
speckle and, surprisingly, found unresolved on all occasions,
excluding any short-period orbits. Later, however, two measures were
made by the author at a 1-m telescope with a phase-grating
interferometer. The first resolution in 1984.8 at 0.04" was tentative Tok1985
(below the diffraction limit), but the second in 1985.7 was secure, Tok1988
being an average of two observations. It was followed by the speckle
resolution at 4-m telescope in 1988.17, after which the pair Mca1993
disappeared again. It was found unresolved in 2012. Tok2012b
The star is well studied. Two statistical surveys of binaries within
25 pc consider it to be single (Duquennoy & Mayor 1991; Raghavan et Duq1991
al. 2010). Heintz & Borgman (1984) state that measures cannot be Rag2010
fitted by any orbit and conclude: "Although this alleged visual binary Hei1984i
(ADS 3701) has three published orbits, it is probably spurious".
Several independent RV studies have shown that this star is not a
spectroscopic binary. Precise RVs measured by Nidever et al. (2002) Nid2002
are stable to better than 100 m s-1 over 388 days, excluding orbital
periods from one to two years with high confidence. Data with lower
precision show a constant RV of +21 km/s over many years (Duquennoy &
Mayor 1991; Abt & Willmarth 2006; Raghavan et al. 2010). The star is AbH2006
located about 1m above the main sequence, supporting the thesis of an
equal-component binary. If the orbit is seen face-on, the RV variation
would be small, especially if the components are of equal brightness
(blended lines move in opposite directions, the centroid stays
constant). However, the lines in this star remain narrow and the
speckle non-resolution during 3.8 yr firmly excludes a face-on orbit.
Remember that 104 Tau is bright (no identification errors possible)
and that the components are supposedly equally bright, hence easy to
resolve by speckle. If this star is single (as everything seems to
suggest), we cannot dismiss its multiple resolutions with micrometer,
eyepiece interferometer, and speckle as spurious; occasional image
doubling (or at least elongation) must be real. Tok2012b
Ghost binary. Tok2012b
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 0.65 +/- 0.09, 2.12, and 1.02 Msun, respectively. Mlk2012
In the WDS summary line this carries an "X" code (non double), but
still retains all the historical measures.
 
 
REFERENCES
 
 
refcode metd author reference
A__1927a Ma - Aitken, R.G. 1927LicOB..12..170A
A__1927a Lick Obs. Bull. 12, 170, 1927
AbH2006 orb - Abt, H.A., & Willmarth, D. 2006ApJS..162..207A
AbH2006 ApJS 162, 207, 2006
Duq1991 - Duquennoy, A. & Mayor, M. 1991A&A...248..485D
Duq1991 A&A 248, 485, 1991
Egg1956 orb - Eggen, O.J. 1956AJ.....61..405E
Egg1956 AJ 61, 405, 1956
Fin1953d J - Finsen, W.S. 1953CiUO..113..170F
Fin1953d Union Obs. Johannesburg Circ. 113, 170, 1953
Hei1984i Po - Heintz, W.D. & Borgman, E.R. 1984AJ.....89.1068H
Hei1984i AJ 89, 1068, 1984
McA1982b Sc j McAlister, H.A. & Hendry, E.M. 1982ApJS...48..273M
McA1982b ApJS 48, 273, 1982
McA1993 Sc j McAlister, H.A., Mason, B.D., Hartkopf, W.I., & Shara, M.M. 1993AJ....106.1639M
McA1993 +orb AJ 106, 1639, 1993
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Nid2002 rv - Nidever, D.L., Marcy, G.W., Butler, R.P., Fischer, D.A., & Vogt, S.S. 2002ApJS..141..503N
Nid2002 ApJS 141, 503, 2002
Rag2010 K - Raghavan, D., McAlister, H.A., Henry, T.J., Latham, D.W., Marcy, G.W., 2010ApJS..190....1R
Rag2010 +S Mason, B.D., Gies, D.R., White, R.J. & ten Brummelaar, T.A.
Rag2010 +P ApJS 190, 1, 2010
Tok1985 Ig u Tokovinin, A.A. 1985A&AS...61..483T
Tok1985 A&AS 61, 483, 1985
Tok1988 Ig u Tokovinin, A.A. & Ismailov, R.M. 1988A&AS...72..563T
Tok1988 A&AS 72, 563, 1988
Tok2010b S - Tokovinin, A. ...................
Tok2010b private communication
Tok2012b S j Tokovinin, A. 2012AJ....144...56T
Tok2012b +orb AJ 144, 56, 2012
WRH1941a J j Wilson, R.H. 1941PFAO....6b...1W
WRH1941a +Ma Pub. Univ. Penn. 6, Pt.4, 3, 1941
WRH1941a (see also U. Penn. Flower Obs. Reprint #34, 1936)
WRH1941a (U and T coded observations per van den Bos, J Obs 34, 85, 1951) 1951JO.....34...85V
 
 
DISCOVERER
 
 
idgroup discov author
1 A Aitken, R.G.
312 HLA Hirsch, L.A., Ciardi, D.R., Howards, A.W., Marcy, G.W., Ruane, G., Gonzalez, E.,
312 HLA Blunt, S., Crepp, J.R., Fulton, B.J., Isaacson, H., Kosiarek, M., Mawet, D.,
312 HLA Sinukoff, E. & Weiss, L.
313 HLA Hirsch, L.A., Rosenthal, L., Fulton, B.J., Howard, A.W., Ciardi, D.R., Marcy, G.W.,
313 HLA Nielsen, E., Petigura, E.A., de Rosa, R.J., Isaacson, H., Weiss, L.M., Sinukoff, E.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
05074+1839 A 3010 AB 1988 18 243 0.1 5.80 5.80 G1V NX 050727.00+183842.1

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

 
 
WDS 05074+1839 A 3010 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 05074+1839 A 3010 AB : MEASURES
 
 
No records found.

 
 
WDS 05074+1839 : VIRTUAL EYEPIECE
 
 

05074+1839 A 3010A mag 5.8 Sp G1V 05074+1839 A 3010B sep 0.1 P.A. 241.40 mag 5.8 05074+1839 HLA 4C sep 6.1 P.A. 310.10 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 05074+1839 : ALADIN DSS IMAGE @ 05h 07m 27.00s +18° 38' 42.1"
 
 
 
 
WDS 05074+1839 A 3010 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

05074+1839 A 3010AB distance=1' 05074+1839 HLA 4AC distance=1' 05078+1759 CRC 48 distance=41' 05048+1815 OCC 27 distance=44' 05063+1755 BRT2322 distance=48' 05066+1752 BRT2323 distance=49' 05053+1929 NSN 23 distance=59' 05116+1829 LDS3643 distance=61' 05093+1934 LDS6168 distance=62' 05043+1924 NSN 554 distance=64' 05039+1752 GWP 640 distance=69' 05076+1949 LDS5661 distance=71' 05124+1824 KPP3599 distance=72' 05055+1948 STT 95 distance=75' 05088+1952 OCC 636 distance=76' 05131+1830 COU 369 distance=81' 05030+1931 A 2428AB distance=83' 05030+1931 A 2428AB,C distance=83' 05040+1730 OCC 966 distance=85' 05134+1832 J 1043 distance=85' 05134+1824 TDS3115 distance=87' 05059+2005 BRT2320 distance=89' 05079+2009 OCC 904 distance=91' 05111+1724 OCC 577 distance=92' 05036+1956 LDS5651 distance=94' 05034+1718 XMI 7AB distance=100' 05032+2000 LDS5648 distance=102' 05002+1811 GIC 53 distance=107' 05078+2025 OCC 644 distance=107' 05075+1652 K 2 260 distance=107' 05122+1716 A 2429 distance=108' 05070+1650 HJ 3267AB distance=110' 05070+1650 FYM 408AC distance=110' 05021+1718 SLE 277 distance=111' 05001+1919 LDS5639 distance=112' 04598+1859 LDS5636 distance=113' 05021+1713 SLE 278 distance=115' 05014+1956 HDS 653AB distance=116' 05014+1956 GII 137Aa,Ab distance=116' 05051+1645 LDS5655 distance=119' 05158+1838 OCC 486 distance=119' 05136+1716 J 936 distance=120' 05050+1644 LDS5652 distance=121' 05153+1754 J 1817 distance=121' 05089+2039 KPP 25 distance=122' 05143+1953 KIR 1AB distance=122' 05076+1631 BPM 118 distance=128' 05071+2047 LDS5660 distance=129' 05119+1645 HJ 3269 distance=131' 04584+1900 COU 709 distance=131' 05092+1629 HEI 40 distance=132' 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 05074+1839 A 3010 AB 243 0.1 1
Show 05074+1839 HLA 4 AC 309 6.3 1
Show 05078+1759 CRC 48 273 0.1 41
Show 05048+1815 OCC 27 -1 0.1 44
Show 05063+1755 BRT2322 2 3.6 48
Show 05066+1752 BRT2323 285 3.2 49
Show 05053+1929 NSN 23 329 7.8 59
Show 05116+1829 LDS3643 18 4.5 61
Show 05093+1934 LDS6168 353 71.3 62
Show 05043+1924 NSN 554 345 0.8 64
Show 05039+1752 GWP 640 159 41.9 69
Show 05076+1949 LDS5661 118 16.4 71
Show 05124+1824 KPP3599 100 1.4 72
Show 05055+1948 STT 95 293 0.9 75
Show 05088+1952 OCC 636 -1 0.1 76
Show 05131+1830 COU 369 86 0.2 81
Show 05030+1931 A 2428 AB 279 0.2 83
Show 05030+1931 A 2428 AB,C 294 3.3 83
Show 05040+1730 OCC 966 -1 0.0 85
Show 05134+1832 J 1043 330 2.6 85
Show 05134+1824 TDS3115 82 1.2 87
Show 05059+2005 BRT2320 40 3.9 89
Show 05079+2009 OCC 904 -1 0.1 91
Show 05111+1724 OCC 577 -1 0.1 92
Show 05036+1956 LDS5651 191 34.7 94
Show 05034+1718 XMI 7 AB 245 22.5 100
Show 05032+2000 LDS5648 88 101.2 102
Show 05002+1811 GIC 53 96 17.0 107
Show 05078+2025 OCC 644 -1 0.0 107
Show 05075+1652 K 2 260 265 10.9 107
Show 05122+1716 A 2429 35 0.8 108
Show 05070+1650 HJ 3267 AB 153 28.2 110
Show 05070+1650 FYM 408 AC 233 12.4 110
Show 05021+1718 SLE 277 42 25.8 111
Show 05001+1919 LDS5639 46 35.6 112
Show 04598+1859 LDS5636 128 56.8 113
Show 05021+1713 SLE 278 106 14.1 115
Show 05014+1956 HDS 653 AB 168 0.6 116
Show 05014+1956 GII 137 Aa,Ab 135 0.2 116
Show 05051+1645 LDS5655 18 32.5 119
Show 05158+1838 OCC 486 -1 0.0 119
Show 05136+1716 J 936 187 4.5 120
Show 05050+1644 LDS5652 273 152.3 121
Show 05153+1754 J 1817 70 4.9 121
Show 05089+2039 KPP 25 315 5.3 122
Show 05143+1953 KIR 1 AB 19 9.4 122
Show 05076+1631 BPM 118 312 69.9 128
Show 05071+2047 LDS5660 228 67.7 129
Show 05119+1645 HJ 3269 60 20.0 131
Show 04584+1900 COU 709 240 0.6 131
Show 05092+1629 HEI 40 180 0.9 132

 
 
WDS 05074+1839 : COMPONENTS
 
 
  A B
B pa=241.4°
sep=0.09"
 
C pa=310.1°
sep=6.09"
pa=311.0°
sep=6.06"
 
 
05074+1839 A
 
 
Coord arcsec 2000 050727.00+183842.1 Mag 5.8 Spectral class G1V (yellow) PmRA 533.00
PmDE 19.0 Tycho2 1286-00403-1
Tycho2
Tycho2 1286-00403-1 Pflag RAmdeg 76.86252944 DEmdeg 18.64505359
PmRA 537.4 PmDE 19.3 E RAmdeg 3 E DEmdeg 4
E pmRA 0.7 E pmDE 0.7 EpRAm 1991.56 EpDEm 1990.93
Num 23 Q RAmdeg 1.3 Q DEmdeg 1.2 Q pmRA 1.3
Q pmDE 1.4 BTmag 5.699 E BTmag 0.014 VTmag 4.986
E VTmag 0.009 Prox 999 TYC T HIP 23835
CCDM RAdeg 76.86124083 DEdeg 18.64500722 EpRA 1990 1.82
EpDE 1990 1.38 E RAdeg 3.3 E DEdeg 3.8 Posflg
Corr -0.1
 
 
05074+1839 B
 
 
Coord arcsec 2000 050726.99+183842.1 Mag 5.8 Calc coord yes
 
 
05074+1839 C
 
 
Coord arcsec 2000 050726.67+183846.0 SAO 94332 HIP 23835 HD 32923
HR 1656 GC 6255 BD BD+18 779 Flamsteed 104 Tauri
Flamsteed name 104 Tau Calc delta mag 5.8 Calc coord yes
SAO
SAO 94332 DelFlag RA1950 PmRA1950 0.0378
DE1950 PmDE1950 0.019 Vmag 5 SpType G0
Double code Source 70 CatNum 6255 DM BD+18 779
DMcomp BDsup HD 32923 M HD 0
GC 6255 RA1950rad 1.32859605 DE1950rad 0.32427718 PmRA2000 0.0378
PmDE2000 0.016
Hipparcos
Catalog H HIP 23835 Proxy RAhms 05 07 26.68
DEdms +18 38 42.0 Vmag 4.91 VarFlag R Vmag G
RAdeg 76.8612 DEdeg 18.645 AstroRef Plx 63.02
CCDM 05075+1839 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 32923 BD BD+18 779
CD CP Dm number +18 779 VIred 0.74
SpType G4V R SpType Coord arcsec 2000 050726.68+183842.0
Hipparcos 2
HIP 23835 Sn 5 So 0 Nc 1
RArad 1.3414801411 DErad 0.3254167586 Plx 64.79 PmRA 534.73
PmDE 17.93 E RArad 0.3 E DErad 0.16 E Plx 0.33
E pmRA 0.41 E pmDE 0.18 Hpmag 5.0444 E Hpmag 0.0006
SHp 0.005 VA 0 BV 0.657 E BV 0.012
VI 0.74