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| Query : 2005AJ....130..809G |
2005AJ....130..809G - Astron. J., 130, 809-814 (2005/August-0)
An astrometric study of the binary star α Ophiuchi.
GATEWOOD G.
Abstract (from CDS):
The work reported here combines data from the Multichannel Astrometric Photometer (MAP), the European astrometric satellite, Hipparcos, and infrared speckle observations of the nearby subgiant binary star system α Oph. The A5 IV primary is found to have a mass of 2.84±0.19 M☉, while the approximately K2 V companion has a mass of 0.78±0.058 M☉. The distance modulus is 0.834±0.024 mag, yielding an absolute visual magnitude of 1.248±0.025 mag and an absolute K magnitude of the secondary of 4.3±0.2 mag. Tables list the MAP data and an ephemeris that indicates that the next 4 yr are ideal for further interferometry.
Abstract Copyright: ∼
Journal keyword(s): Stars: Binaries: Spectroscopic - Stars: Binaries: Visual - Stars: Individual: Constellation Name: α Ophiuchi
Nomenclature: Table 1: Gat NNNN (Nos 1313-1320, 1322-1323) added.
Simbad objects: 11
| Number of rows : 11 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | TYC 1000-2324-1 | * | 17 33 45.3245801928 | +12 44 32.152021008 | 11.54 | 10.93 | F5V | 3 | 0 | |||
| 2 | HD 159355 | SB* | 17 33 49.3685155608 | +12 13 19.685369208 | 9.31 | 8.93 | A5 | 9 | 0 | |||
| 3 | TYC 1000-2203-1 | * | 17 33 59.4250428168 | +12 34 13.037692656 | 10.79 | 10.17 | F5V | 3 | 0 | |||
| 4 | HD 159391 | PM* | 17 34 01.0273258152 | +12 30 44.602215408 | 9.16 | 7.84 | K0 | 6 | 0 | |||
| 5 | TYC 1000-1577-1 | * | 17 34 05.7936013272 | +12 47 16.396063044 | 11.37 | 10.33 | F5V | 3 | 0 | |||
| 6 | TYC 1000-1918-1 | * | 17 34 25.7382919632 | +12 48 16.773709824 | 11.78 | 10.03 | K3III | 3 | 0 | |||
| 7 | TYC 1000-2002-1 | * | 17 34 31.8903528144 | +12 37 01.812327636 | 11.20 | 10.64 | A7V | 3 | 0 | |||
| 8 | TYC 1000-1133-1 | * | 17 34 52.2531222720 | +12 29 50.594754228 | 11.24 | 10.45 | F0V | 3 | 0 | |||
| 9 | * alf Oph | ** | 17 34 56.06945 | +12 33 36.1346 | 2.32 | 2.22 | 2.07 | 1.93 | 1.85 | A5IVnn | 495 | 0 |
| 10 | BD+12 3255 | * | 17 35 36.6040326768 | +12 36 46.052618040 | 10.85 | 10.06 | G0 | 3 | 0 | |||
| 11 | BD+12 3257 | * | 17 35 55.2958387176 | +12 19 46.464971700 | 10.22 | 9.14 | K0III | 3 | 0 |
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