HR 3098
catalogues and names
| catalogues and names | HR 3098, HD 65123, SAO 116165, BD +1 1959, WDS 07573+0108 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 7h 57min 16.2sec | DEC: +1° 7' 37'' | ||
| position (B1900) | RA: 7h 52min 7.4sec | DEC: +1° 23' 39'' | ||
| proper motion (J2000) | RA: -0.172 arcsec/a | DEC: -0.002 arcsec/a | ||
| radial velocity | 0 km/s | |||
| trigonometric parallax | 0.005 arcsec | |||
| galactic coordinates | longitude: 219.58° | latitude: 15.14° | ||
| note (category: dynamical parallaxes): | 0.023". |
magnitude
| visual magnitude | 6.35 (V on UBV Johnson system) |
spectral / color information
| spectral class | F7V |
| B-V-magnitude | 0.5 |
| U-B-magnitude | 0 |
double/multiple star system information
| separation | 0.3 arcsec |
| mag difference (of double or brightest multiple) | 0.2 |
| note (category: double and multiple data): | 7.0 F5V, 7.1 F7V, 57.04y, a = 0.44". Combined mag., colors. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 7h 57min 16.3sec | DEC: +1° 7' 37.16'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: -0.0106 arcsec/a | DEC: 0.002 arcsec/a | source: 25 | |
| radial velocity | 0 km/s | source: 25 | ||
| trigonometric parallax | 0.005 arcsec | - | source: 25 | |
| galactic coord. (B1950) | longitude: 219.58° | latitude: 15.14° | ||
magnitude:
| visual | 6.35 (observed) | source: 25 |
| photovisual | 6.4 | source: 2 |
| photographic | 6.8 | source: 16 |
spectral information:
| spectral class | F8 | source: 96 | |
| Morgan-Keenan | F7V | source: 25 | |
| B-magnitude | 6.85 ±0.05 | B-V-magnitude | 0.5 |
| U-magnitude | 6.85 ±0.05 | U-B-magnitude | 0 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 0.2 |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991 | |
| 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 | |
| 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: 7h 54min 41.816sec | DEC: +1° 15' 42.69'' | ±0.037 arcsec |
| position (J2000) | RA: 7h 57min 16.201sec | DEC: +1° 7' 36.75'' | |
| proper motion B1950 (FK4) | RA: -0.0117 arcsec/a | DEC: -0.005 arcsec/a | ±0.006 arcsec/a in RA ±0.007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0115 arcsec/a | DEC: -0.002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | F8 |
| 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: 10755 |
| Durchmusterung | BD+01 1959 |
| Boss General Catalogue | 10755 |
| Henry Draper Catalogue | 65123 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 7h 57.3min | DEC: +1° 8' |
| proper motion (J2000) | RA: -0.16 arcsec/a | DEC: 0.002 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 |
| - | 1843 | often | ° | '' | 7.1 | 7.3 | F7V | STT 185 |
discoverer information:
| discoverer code | discoverer | reference |
| STT 185 | Struve, O. | - |
notes:
| note | P = 59.4yr., a = 0.51", motion direct. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 7h 52.1min | DEC: +1° 24' |
magnitudes, spectral classes, orbital elements:
| author: | W.H. van den Bos |
| date of observation: | 1948 |
| magnitude of component A: | 7 |
| magnitude of component B: | 7 |
| spectral class component B: | F7V |
| spectral class component B: | F7V |
| period [y]: | 57.04 |
| semi-major axis [arcsec]: | 0.44 |
| inclination [deg]: | 79 |
| node [deg]: | 9 |
| eccentricity: | 0.77 |
| time of periastron passage: | 1945.62 |
| dates of ephemeris: | 1 rev. |
| grade: | good |
| reference: | Union Obs. Circ. 5, 310; 1949. |
| other name(s) | STT 185 |