90 Herculis
catalogues and names
| catalogues and names | NSV 09834, 90 Her, HR 6677, HD 163217, SAO 47037, BD +40 3233, WDS 17533+4000 |
| constellation | Hercules |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 17h 53min 18.1sec | DEC: +40° 0' 29'' | ||
| position (B1900) | RA: 17h 50min 2.7sec | DEC: +40° 1' 36'' | ||
| proper motion (J2000) | RA: 0.011 arcsec/a | DEC: 0.053 arcsec/a | ||
| radial velocity | -35 km/s note: suspected variable radial velocity |
|||
| rotational velocity | <19 km/s | |||
| trigonometric parallax | 0.014 arcsec | |||
| galactic coordinates | longitude: 66.09° | latitude: 27.66° | ||
| note (category: dynamical parallaxes): | 0.003". |
magnitude
| visual magnitude | 5.16 (V on UBV Johnson system) |
spectral / color information
| spectral class | K1IIIbCN-1 |
| B-V-magnitude | 1.18 |
| U-B-magnitude | 1.12 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
| note (category: spectra): | If the secondary is a main sequence star, the inferred spectral type is A5V. |
variability information
| variable star identification | 9834 |
| note (category: variability): | ADS 10875. Not certain which component is the var. suspect. Rapid change in difference between components. |
double/multiple star system information
| separation | 1.6 arcsec |
| mag difference (of double or brightest multiple) | 3.3 |
miscellaneous information
| note (category: group membership): | Hyades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 17h 53min 18.032sec | DEC: +40° 0' 28.66'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0008 arcsec/a | DEC: 0.052 arcsec/a | source: 25 | |
| radial velocity | -35 km/s | source: 25 | ||
| trigonometric parallax | 0.014 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 66.1° | latitude: 27.66° | ||
magnitude:
| visual | 5.16 (observed) | source: 25 |
| photovisual | 5.1 | source: 2 |
| photographic | 6.1 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K1+IIIbCN-1 | source: 25 | |
| B-magnitude | 6.34 ±0.05 | B-V-magnitude | 1.18 |
| U-magnitude | 7.46 ±0.05 | U-B-magnitude | 1.12 |
double/multiple star system information:
| separation between brightest and second brightest component | 1.6 arcsec |
| magnitude difference between brightest and second brightest component | 3.2 |
| position angle | 115 ° |
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: 17h 51min 40.278sec | DEC: +40° 0' 58.79'' | ±0.014 arcsec |
| position (J2000) | RA: 17h 53min 18.06sec | DEC: +40° 0' 28.66'' | |
| proper motion B1950 (FK4) | RA: 0.0006 arcsec/a | DEC: 0.052 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.001 arcsec/a | DEC: 0.053 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.1 (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: 24342 |
| Durchmusterung | BD+40 3233 |
| Boss General Catalogue | 24342 |
| Henry Draper Catalogue | 163217 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 17h 53.3min | DEC: +40° 0' |
| proper motion (J2000) | RA: 0.009 arcsec/a | DEC: 0.052 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 |
| - | 1875 | 32 | 123° | 1.8'' | 5.2 | 8.4 | K3III | BU 130 |
| 1966 | 115° | 1.6'' |
discoverer information:
| discoverer code | discoverer | reference |
| BU 130 | Burnham, S.W. | - |
notes:
| note | 90 Her. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 17h 51min 40.3sec | DEC: +40° 0' 59'' |
variability informations:
| magnitute at max. brightness | 5.15 |
| magnitute at min. brightness | 5.18 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | K3 |
references
| to a study | 620955D (designation: ADS 10875) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |