V2391 Ophiuchi
catalogues and names
| catalogues and names | V2391 Oph, 70 Oph, HR 6752, HD 165341, SAO 123107, BD +2 3482, WDS 18055+0230A |
| constellation | Ophiuchus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 18h 5min 27,3sec | DEC: +2° 29' 58'' | ||
| position (2001,18) | RA: 18h 5min 31sec | DEC: +2° 29' 57'' | ||
| position (B1900) | RA: 18h 0min 24,1sec | DEC: +2° 31' 22'' | ||
| proper motion (J2000) | RA: 0,266 arcsec/a | DEC: -1,093 arcsec/a | ||
| radial velocity | -7 km/s note: spectroscopic binaries note: orbital data avaible |
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| rotational velocity | 16 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0,201 arcsec | |||
| galactic coordinates | longitude: 29,91° | latitude: 11,38° | ||
| note (category: dynamical parallaxes): | 0.198". |
magnitude
| visual magnitude | 4,03 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0V |
| B-V-magnitude | 0,86 |
| U-B-magnitude | 0,54 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
| number of components of multiple star system | 11 |
| separation | 1,9 arcsec |
| mag difference (of double or brightest multiple) | 1,8 |
| component ID | AB |
| note (category: double and multiple data): | AB 4.20 K0V, 5.99 K4V, 88.13y, a = 4.545". B is 6.00V, +1.15(B-V), vsini =<25k/s. Aitken listed 9 additional faint companions within 180". |
| note (category: spectroscopic binaries): | ADS 11046AB, 88.13y D, K 3.4k/s, V0 -7.1k/s, asini 1300. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 18h 5min 27,386sec | DEC: +2° 29' 58,63'' | ±0,2 arcsec | source: 52 |
| position (2001,18) | RA: 18h 5min 31sec | DEC: +2° 29' 58'' | JD: 2451975,78 | |
| proper motion (J2000) | RA: 0,019 arcsec/a | DEC: -1,099 arcsec/a | source: 25 | |
| radial velocity | -7 km/s | source: 25 | ||
| trigonometric parallax | 0,201 arcsec | ±0,02 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 29,91° | latitude: 11,38° | ||
magnitude:
| visual | 4,03 (observed) | source: 25 |
| photovisual | 4,1 | source: 2 |
| photographic | 4,9 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K0-V | source: 25 | |
| B-magnitude | 4,89 ±0,05 | B-V-magnitude | 0,86 |
| U-magnitude | 5,43 ±0,05 | U-B-magnitude | 0,54 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 1,97 |
sources:
| 2 | HD and HDE Catalogs |
| Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University | |
| 16 | PPM North and PPM South Catalogs and PPM Supplement |
| Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993 | |
| 19 | WDS Catalog |
| Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996 | |
| 25 | Bright Star Catalogue, 5th edition |
| Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 96 | SAO or HD/HDE Catalog |
| Reference from Value 1 or Reference from Value 2 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (B1950) | RA: 18h 2min 55,608sec | DEC: +2° 30' 34,62'' | ±0,01 arcsec |
| position (2001,18) | RA: 18h 5min 30sec | DEC: +2° 30' 54'' | JD: 2451975,78 |
| position (J2000) | RA: 18h 5min 27,347sec | DEC: +2° 29' 58,28'' | |
| proper motion B1950 (FK4) | RA: 0,0172 arcsec/a | DEC: -1,094 arcsec/a | ±0,002 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0177 arcsec/a | DEC: -1,093 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 24641 |
| Durchmusterung | BD+02 3482 |
| Boss General Catalogue | 24641 |
| Henry Draper Catalogue | 165341 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 18h 5,5min | DEC: +2° 30' |
| proper motion (J2000) | RA: 0,227 arcsec/a | DEC: 0 arcsec/a |
double/multiple star system information:
| component | year | number of measures | position angle | angular separation | magnitude of 1st component | magnitude of 2nd component | spectral class(es) | discoverer code |
| AB | 1819 | often | ° | '' | 4,03 | 6 | K0V K4V | STF2272 |
| Aa | 1878 | 42 | 198° | 71,4'' | 4,1 | 13 | - | STF2272 |
| 1947 | 282° | 34,9'' | ||||||
| Ab | 1905 | 16 | 252° | 70'' | 4,1 | 14 | - | STF2272 |
| 1946 | 287° | 76,7'' | ||||||
| AR | 1905 | 20 | 73° | 105'' | 4,1 | 13 | - | STF2272 |
| 1946 | 50° | 119,4'' | ||||||
| AS | 1878 | often | 50° | 87,2'' | 4,1 | 12,5 | - | STF2272 |
| 1946 | 22° | 141,1'' | ||||||
| AT | 1905 | 20 | 103° | 120,3'' | 4,1 | 13,1 | - | STF2272 |
| 1946 | 80° | 110,6'' | ||||||
| AU | 1905 | 15 | 329° | 142,4'' | 4,1 | 13 | - | STF2272 |
| 1945 | 334° | 184,5'' | ||||||
| AV | 1886 | 26 | 224° | 165,9'' | 4,1 | 11,8 | - | STF2272 |
| 1946 | 246° | 138,6'' | ||||||
| AW | 1924 | 1 | 4° | 158,3'' | 4,1 | - | - | STF2272 |
| Ba | 1899 | 4 | 208° | 50,8'' | 6,3 | - | - | STF2272 |
| 1932 | 252° | 32,4'' | ||||||
| Bb | 1900 | 1 | 247° | 69,3'' | 6,3 | - | - | STF2272 |
| BR | 1900 | 1 | 168° | 68,4'' | 6,3 | - | - | STF2272 |
| VT | 1906 | 1 | 73° | 247,9'' | 11,8 | 13,1 | - | STF2272 |
| VW | 1906 | 1 | 270° | 180,5'' | 11,8 | 12,6 | - | STF2272 |
| VX | 1906 | 1 | 250° | 16,6'' | 11,8 | 13,5 | - | STF2272 |
discoverer information:
| discoverer code | discoverer | reference |
| STF2272 | Struve, F.G.W. | - |
notes:
| note | 70 Oph. AB: P = 88.3yr., a = 4.56", motion retrograde. Spectral types K0V, K4V. Proper motion of A +227 -1093. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 18h 0,4min | DEC: +2° 32' |
magnitudes, spectral classes, orbital elements:
| author: | W.D. Heintz |
| date of observation: | 1973 |
| magnitude of component A: | 4,2 |
| magnitude of component B: | 4,2 |
| spectral class component B: | K0V |
| spectral class component B: | K0V |
| period [y]: | 88,13 |
| semi-major axis [arcsec]: | 4,545 |
| inclination [deg]: | 121,15 |
| node [deg]: | 301,7 (ascending) |
| equinox of node: | 2000 |
| eccentricity: | 0,5 |
| time of periastron passage: | 1984,05 |
| dates of ephemeris: | 1974-1998 |
| grade: | definitive |
| reference: | Circ. Inf. No. 60, 1973. |
| notes | 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 and van Dessel discuss the radial velocities (Pub. Dom. Astrophys. Obs. 14, 345; 1976). |