WDS 18211+7244 BUP 182 BC : NOTES
 
 
discov_num notes refcode
LAB 5 Aa,Ab: chi Dra = 44 Dra. Astrometric, interferometric, and
spectroscopic binary. See discussion of the RV's by J. Vinter Hansen
(Lick Obs. Bul. 19, 141, 1942).
See discussion and orbital elements by Labeyrie et al. (1974). Lab1974
P, T, and e for Alden (1936) solution taken from spectroscopic orbit Ald1936c
Speckle and spectroscopic orbit by Tomkin et al. (1987), used P,e Tom1987
fixed from spectroscopy. Positional elements disagree somewhat with
those of the astrometric orbit (prior to resolution of the companion)
by Breakiron & Gatewood (1974). Brk1974
See Baize & Petit (1989) catalog of doubles with variable component. Baz1989d
Analyses of the spectroscopic/interferometric orbit are given by McA1980b
McAlister (1980) and McA1980c and Tomkin et al. (1987). Tom1987
Hipparcos astrometric solution adopted some elements from the orbit of HIP1997d
Tomkin et al. (1987). Tom1987
Pourbaix gives combined solution for this resolved SB2, yielding Pbx2000b
orbital parallaxes and component masses.
The Farrington et al. (2010) orbit is based on speckle plus K'-band CIA2010
CHARA Array separated fringe packet observations. An orbital parallax
of 123.4+/-1.9 mas is determined. Based on the mass ratio
determination of Nordstrom et al. (2004 A&A 418, 989), derived masses
are 0.96+/-0.03 and 0.75+/-0.03 Msun, well below the expected masses
for an F8IV-V and late-G/early-K dwarf pair. The aperture and method,
8m and speckle, are set to give the resolution capability of this
technique, which is less than classical interferometric methods.
Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 1.71 +/- 0.06, 2.07, and 1.13 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Ald1936c orb - Alden, H.L. 1936AJ.....45..113A
Ald1936c AJ 45, 113, 1936
Baz1989d - Baize, P. & Petit, M. 1989A&AS...77..497B
Baz1989d A&AS 77, 497, 1989
Brk1974 - Breakiron, L.A. & Gatewood, G. 1974PASP...86..448B
Brk1974 PASP 86, 448, 1974
CIA2010 Kf j Farrington, C.D., ten Brummelaar, T.A., Mason, B.D., Hartkopf, W.I., McAlister, 2010AJ....139.2308F
CIA2010 +orb H.A., Raghavan, D., Turner, N.H., Sturmann, L., Sturmann, J., & Ridgway, S.T.
CIA2010 AJ 139, 2308, 2010
HIP1997d orb - Hipparcos 1997yCat.1239....0E
HIP1997d Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d (DMSA/O Orbital Solutions)
Lab1974 S j Labeyrie, A., Bonneau, D., Stachnik, R.V., & Gezari, D.Y. 1974ApJ...194L.147L
Lab1974 +orb ApJ 194, L147, 1974
Lab1974 (data from Hale 5m, KPNO 3.8m, 2.1m. Aperture listed as mean value of 3.6m unless
Lab1974 specifically given in paper)
McA1980b Sc j McAlister, H.A. & Fekel, F.C. 1980ApJS...43..327M
McA1980b ApJS 43, 327, 1980
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Pbx2000b orb - Pourbaix, D. 2000A&AS..145..215P
Pbx2000b A&AS 145, 215, 2000
Tom1987 orb - Tomkin, J., McAlister, H.A., Hartkopf, W.I., & Fekel, F.C. 1987AJ.....93.1236T
Tom1987 AJ 93, 1236, 1987
 
 
DISCOVERER
 
 
idgroup discov author
1 BUP Burnham proper motion stars (see Burnham, Carnegie Inst. Wash. #168, 1913)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18211+7244 BUP 182 BC 1908 1 302 10.2 11.80 13.30 182113.30+724622.0
18211+7244 BUP 182 BC 2008 2 303 9.3 11.80 13.30 182113.30+724622.0
18211+7244 BUP 182 BC 2010 4 301 8.8 12.10 14.50 N 182102.31+724654.2
18211+7244 BUP 182 BC 2015 4 303 9.1 12.10 14.50 N 182102.31+724654.2

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