WDS 18055+0230 STF 2272 AD : NOTES
 
 
discov_num notes refcode
STF2272 70 Oph = p Oph. A complicated multiple system with high proper motion,
which has led to some confusion in component identification. A 1924
measure by Burton supposedly of AW was not to the same W component as Btn1929b
measured in earlier VW observations. The Burton secondary is now named
Y. Similarly, See supposedly measured the BR pair; this pair is now See1911
labelled BZ.
A component is 70 Oph.
CHARA Array Limb-darkened diameter of A,B: CIA2012f
R = 0.8310 +/- 0.0044, 0.6697 +/- 0.0089 \rsun,
L = 0.53 +/- 0.02, 0.15 +/- 0.02 \lsun,
Teff = 5407 +/- 52, 4393 +/- 149 K, M = 0.846, 0.698 \msun.
Spectral types K0V,K4V. Proper motions of A and B are (+276,-1092) and
(+442,-1253), respectively. Proper motion of other components follow:
C : -019-012 D : -002+002 R : -007-007
S : +005-004 T : +001-006 U : -013-010
V : +002-014 Y : -023-028 Z : -022+007
The existence of a third body, for which orbits have been computed, is
now generally discounted as the strong photographic coverage fails to
show any such variation. Batten & van Dessel (1976) discuss the radial Bte1976
velocities.
Pourbaix gives combined solution for this resolved SB2, yielding
orbital parallaxes and component masses. Pbx2000b
1995.559: Absolute quadrant determined by triple-correlation technique Pru2002b
AB: H 2 4. MEv2010
AB: Additional notes may be found in Simonov (1937) and Smw1937
Fatou (1941). Fat1941
AB: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 1.60 +/- 0.22, 1.61, and 1.56 Msun, respectively. Mlk2012
AC, AD, AR, AS, AT, AU, AV: Optical pairs, based on study of relative
motion of components using the method of apparent motion parameters. Kiy2008
From their combined speckle/spectroscopic solution, Eggenberger et al. Egn2008
(2008) derive masses 0.89 +/- 0.02 and 0.73 +/- 0.01 Msun and a
parallax of 194.2 +/- 1.2 mas. Adopting both asteroseismic and
non-asteroseismic observational constraints with several models, they
derive an age of 6.2 +/- 1.0 Gyr, an initial helium mass fraction Y =
0.266 +/- 0.015, and an initial metallicity (Z/X) = 0.0300 +/- 0.0025.
AS: Additional notes may be found in Burnham (1894). Bu_1894
AR, AT, AU, AV, BR: Rectilinear solutions by Hurowitz et al. (2014). USN2014b
 
 
REFERENCES
 
 
refcode metd author reference
Bte1976 - Batten, A.H., & van Dessel 1976PDAO...14..345B
Bte1976 Pub. DAO 14, 345, 1976
Btn1929b Ma j Burton, H.E. 1929PUSNO..12..235.
Btn1929b Pub. USNO 12, 235, 1929
Bu_1894 Ma j Burnham, S.W. 1894PLicO...2....3B
Bu_1894 Pub. Lick Obs. 2, 3, 1894 (includes most data from Bu_1893a) 1893AN....131..329B
CIA2012f not j Boyajian, T.S., von Braun, K., van Belle, G., McAlister, H.A., ten Brummelaar, 2012ApJ...757..112B
CIA2012f T.A., Kane, S.R., Muirhead, P.S., Jones, J., White, R., Schaefer, G., Ciardi, D., .
CIA2012f Henry, T., Lopez-Morales, M., Ridgway, S., Gies, D., Jao, W.-C., Rojas-Ayala, B., .
CIA2012f Parks, J.R., Sturmann, L., Sturmann, J., Turner, N.H., Farrington, C., Goldfinger, .
CIA2012f P.J. & Berger, D.H.
CIA2012f ApJ 757, 112, 2012 .
Egn2008 orb - Eggenberger, P., Miglio, A., Carrier, F., Fernandes, J., & Santos, N.C. 2008A&A...482..631E
Egn2008 A&A 482, 631, 2008
Fat1941 Ma - Fatou, P. 1941JO.....24...29F
Fat1941 J. Obs. 24, 29, 1941
Kiy2008 - Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. 2008SvAL...32..405K
Kiy2008 SvAL 34, 405, 2008
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
Pbx2000b orb - Pourbaix, D. 2000A&AS..145..215P
Pbx2000b A&AS 145, 215, 2000
Pru2002b S j Prieur, J.-L., Koechlin, L., Ginestet, N., Carquillat, J.-M., Aristidi, E., 2002ApJS..142...95P
Pru2002b Scardia, M., Arnold, L., Avila, R., et al.
Pru2002b ApJS 142, 95, 2002
See1911 Ma j See, T.J.J. .
See1911 Pub. USNO 6, A117, 1911
Smw1937 Ma - Simonov, G.V. 1938VeBB....5.....S
Smw1937 Pub. Berlin Babelsberg Obs. 11, Pt.5, 1937
USN2014b lin - Hurowitz, J.L., Hartkopf, W.I., & Mason, B.D. 2014IAUDS.183....1H
USN2014b Inf. Circ. 183, 1, 2014
 
 
DISCOVERER
 
 
idgroup discov author
1 STF Struve, F.G.W.
34 TNN Tanner, A.M., Gelino, C.R., & Law, N.M.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18055+0230 STF2272 AD 1946 17 287 76.7 4.22 14.36 NL P 180527.37+022959.3
18055+0230 STF2272 AD 2000 18 311 120.0 4.22 14.36 NL P 180527.37+022959.3
18055+0230 STF2272 AD 2007 18 324 88.1 4.22 14.36 NL P 180527.37+022959.3
18055+0230 STF2272 AD 2009 19 325 91.1 4.22 14.36 NL P 180527.37+022959.3

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