WDS 05387-0236 BOY 24 Ja,Jb : NOTES
 
 
discov_num notes refcode
STF3135 Rabe measures principal stars STF 761 and STF 762. Rab1923
1914, 324@, 209.79". This new WDS entry created 02/18/98.
Spectral types of primary and secondary assigned by ten Brummelaar et TtB2000
al., based on adaptive optics observations.
BU 1032 sig Ori = 48 Ori. A is the variable V1030 Ori. This is the brightest
pair in a trapezium system with at least five components, including
components C (mag. 8.79, 11", A2V), D (mag. 6.62, 13", B2V), and the
helium-rich star E, BD-02@1327. A has also been reported to be a short
period SB2.
Heintz (1974) gives formulae for the motions AB,C and AB,D. Hei1974b
The suspected small RV variation of AB was not confirmed in David
Dunlap Obs. spectra.
See Baize & Petit (1989) catalog of doubles with variable component. Baz1989d
The AB pair has decreased in position angle from 171 deg to 125 deg
between 1975 and 1994. Fullerton (1990) describes three spectral Ful1990
components in the He I 5876 A profile which suggests that one of the
stars is a double-lined spectroscopic binary (see Bolton, 1974 ApJ
192, L7). Classifications of the B, C, and D components are from Hof1991
Hoffleit & Warren (1991), while the classification for the E Lev1991b
component is from Morrell & Levato (1991). Msn1998a
AB: Additional notes may be found in Worley (1956). Wor1956b
AB: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 27.34 +/- 40.70, 25.32, 21.87 Msun, respectively. Mlk2012
sig Ori Aa,Ab: Simon-Diaz et al. (2015) derive a new spectroscopic orbit for
the primary (sig Ori Aa,Ab) as well as astrometry and photometry for
the AB pair. New values for mass, log g, age, Teff, etc are derived
for Aa, Ab, and B. SiD2015
NOI 6 Aa,Ab: Schaefer et al. (2016) resolved the primary of sig Ori A and
derive a new combined solution, as well as a new orbit of the AB pair.
Derived masses for Aa, Ab, and B are 16.99 +/- 0.20, 12.81 +/- 0.18,
and 11.54 +/- 1.15 Msun, respectively. They also derive a parallax of
2.5806 +/- 0.0088 mas, corresponding to distance 387.51 +/- 0.12 pc. NOI2016b
Spectral type of Aa 09.5V, Ab B0.5V Opl2023
STF 762 AB,C: H 2 11. MEv2010
Sigma Ori E (V1030 Ori) has a strong magnetic field and a magnetosphere IAU2014a
with two clouds of plasma constrained by magnetic and centrifugal
forces which co-rotate with the 1.19d period of the star which results
in eclipse features.
Note that the C component was first resolved by Dawes while D and E Da_1835
were first resolved by Mayer. However, the discovery designation is MyC1784
maintained due to the long standing historical designations.
STF3135 AB,F: F component = primary of 05386-0233 STF 761.
RAS 22 Ea,Eb: Helium star V1030 Ori, type B2; spectral type of Eb estimated
as late-A. Ras2014
CAB 26 Ha,Hb: [W96] 4771-899 = Mayrit 528005
BOY 24 Ja,Jb: sig Ori IRS 1 = Mayrit 3020 Boy2009
 
 
REFERENCES
 
 
refcode metd author reference
Baz1989d - Baize, P. & Petit, M. 1989A&AS...77..497B
Baz1989d A&AS 77, 497, 1989
Boy2009 A j Bouy, H., Huelamo, N., Martin, E.L., Marchis, F., Barrado Y Navascues, D., 2009A&A...493..931B
Boy2009 Kolb, J.,Marchetti, E., Petr-Gotzens, M.G., Sterzik, M., Ivanov, V.D., Kohler, R.,
Boy2009 & Nurnberger, D.
Boy2009 A&A 493, 931, 2009
Da_1835 Ma - Dawes, W.R. 1835MmRAS...8...61D
Da_1835 MemRAS 8, 61, 1835
Ful1990 - Fullerton, A.W. .
Ful1990 PhD thesis, Univ. of Toronto, 1990
Hei1974b orb - Heintz, W.D. 1974AJ.....79..397H
Hei1974b AJ 79, 397, 1974
Hof1991 - Hoffleit, D. & Jaschek, C. 1991bsc..book.....H
Hof1991 The Bright Star Catalogue, Fifth Revised Edition (preliminary version), 1991
IAU2014a - Oksala, M. (IAU Symposium 307, in press) .
Lev1991b - Morrell, N. & Levato, H. 1991ApJS...75..965M
Lev1991b ApJS 75, 965, 1991
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Msn1998a Sc j Mason, B.D., Gies, D.R., Hartkopf, W.I., Bagnuolo, Jr., W.G., 1998AJ....115..821M
Msn1998a ten Brummelaar, T.A., & McAlister, H.A.
Msn1998a AJ 115, 821, 1998
MyC1784 - Mayer, Ch. .
MyC1784 "Verzeichniss aller Doppelsterne"
MyC1784 (Directory of all hitherto discovered doubled stars) in "Astronomisches Jahrbuch
MyC1784 fur das Jahr 1784" by J.E. Bode, pp 183-186
MyC1784 (Note: this is the first known double star catalog)
NOI2016b Kn j Schaefer, G.H., Hummel, C.A., Gies, D.R., Zavala, R.T., Monnier, J.D., 2016AJ....152..213S
NOI2016b Walter, F.M., Turner, N.H., Baron, F., ten Brummelaar, T., Che, X.,
NOI2016b Farrington, C.D., Kraus, S., Sturmann, J., & Sturmann, L.
NOI2016b AJ 152, 213, 2016 (see also CIA2016c)
Opl2023 - Oplistilova, A., Mayer, P., Harmanec, P. et al. 2023A&A...672A..31O
Opl2023 A&A 672, A31, 2023
Rab1923 Ma - Rabe, W. 1923AN....217..413R
Rab1923 AN 217, 413, 1923
Ras2014 S j Rastegaev, D.A., Balega, Y.Y., Dyachenko, V.V., Maksimov, A.F., & Malogolovets, E. 2014AstBu..69..296R
Ras2014 Astrophys. Bull. 69, 296, 2014
SiD2015 orb j Simon-Diaz, S., Caballero, J.A., Lorenzo, J., Maiz Apellaniz, J., Schneider, F.R., 2015ApJ...799..169S
SiD2015 +C Negueruela, I., Barba, R.H., Dorda, R., Marco, A., Montes, D., Pellerin, A.,
SiD2015 Sanchez-Berumudez, S., et al.
SiD2015 ApJ 799, 169, 2015
TtB2000 Ac j ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr., 2000AJ....119.2403T
TtB2000 Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
TtB2000 AJ 119, 2403, 2000 (magnitude differences from Mt. Wilson AO)
Wor1956b Ma - Worley, C.E. 1956AJ.....61..162W
Wor1956b AJ 61, 162, 1956
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 CAB Caballero, J.A.
188 CAB Caballero, J.A., Montes, D., Klutsch, A., Genebriera, J., Miret, F.X., Tobal, T.,
188 CAB Cairol, J. & Redraz, S.
199 CAB Aberasturi, M., Caballero, J.A., Montesinos, B., Galvez-Ortiz, M.C., Solano, E. &
199 CAB Martin, E.L.
209 CAB Alonso-Floriano, F.J., Caballero, J.A., Cortes-Contreras, M., Solano, E., &
209 CAB Montes, D.
218 CAB Caballero, J.A., de Burgos, A., Alonso-Floriano, F.J., Cabrera-Lavers, A.,
218 CAB Garcia-Alvarez, D. & Montes, D.
219 SHJ South, J. & Herschel, J.
236 STF Struve, F.G.W.
269 TRN Turner, N.H., ten Brummelaar, T.A., & Mason, B.D.
270 TRN Turner, N.H., ten Brummelaar, T.A., McAlister, H.A., Mason, B.D., Hartkopf, W.I.,
270 TRN & Roberts, L.C.
271 TRN Turner, N.H., ten Brummelaar, T.A., Roberts, L.C., Mason, B.D., Hartkopf, W.I., &
271 TRN Gies, D.R.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
05387-0236 BOY 24 Ja,Jb 2007 2 317 0.2 10.60 12.80 N K 053844.90-023757.0

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