97 Aquarii
catalogues and names
| catalogues and names | 97 Aqr, HR 8890, HD 220278, SAO 165658, BD -15 6406, WDS 23227-1502 |
| constellation | Aquarius |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 22min 39.2sec | DEC: -15° 2' 21'' | ||
| position (B1900) | RA: 23h 17min 24.7sec | DEC: -15° 35' 17'' | ||
| proper motion (J2000) | RA: 0.112 arcsec/a | DEC: 0.019 arcsec/a | ||
| radial velocity | -12 km/s | |||
| rotational velocity | 141 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.022 arcsec | |||
| galactic coordinates | longitude: 58.78° | latitude: -66.08° | ||
| note (category: dynamical parallaxes): | 0.017". |
magnitude
| visual magnitude | 5.2 (V on UBV Johnson system) |
spectral / color information
| spectral class | A3Vp |
| B-V-magnitude | 0.2 |
| U-B-magnitude | 0.1 |
| note (category: spectra): | Lambda Boo star, Mg 4481 wk, Ca II st. |
double/multiple star system information
| separation | 0.4 arcsec |
| mag difference (of double or brightest multiple) | 0.7 |
| note (category: double and multiple data): | 5.6 A2V, 6.4 A7V, 63.16y, a = 0.420". |
miscellaneous information
| note (category: group membership): | Hyades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 22min 39.199sec | DEC: -15° 2' 22.11'' | ±0.35 arcsec | source: 34 |
| proper motion (J2000) | RA: 0.0079 arcsec/a | DEC: 0.007 arcsec/a | source: 25 | |
| radial velocity | -12 km/s | source: 25 | ||
| trigonometric parallax | 0.022 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 58.8° | latitude: -66.08° | ||
magnitude:
| visual | 5.2 (observed) | source: 25 |
| photovisual | 5.5 | source: 16 |
| photographic | 5.4 | source: 2 |
spectral information:
| spectral class | A3 | source: 96 | |
| Morgan-Keenan | A3Vp | source: 25 | |
| B-magnitude | 5.4 ±0.05 | B-V-magnitude | 0.2 |
| U-magnitude | 5.5 ±0.05 | U-B-magnitude | 0.1 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 0.7 |
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 | |
| 34 | IRS Catalog |
| Corbin, T.E., 1991, U.S. Naval Observatory, International Reference Stars Catalog | |
| 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: 23h 20min 2.011sec | DEC: -15° 18' 50.34'' | ±0.03 arcsec |
| position (J2000) | RA: 23h 22min 39.211sec | DEC: -15° 2' 21.27'' | |
| proper motion B1950 (FK4) | RA: 0.0075 arcsec/a | DEC: 0.022 arcsec/a | ±0.004 arcsec/a in RA ±0.004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0077 arcsec/a | DEC: 0.019 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A3 |
| 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: 32531 |
| Durchmusterung | BD-15 6406 |
| Boss General Catalogue | 32531 |
| Henry Draper Catalogue | 220278 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 23h 22.7min | DEC: -15° 2' |
| proper motion (J2000) | RA: 0.108 arcsec/a | DEC: 0.011 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 |
| - | 1900 | 67 | ° | '' | 5.7 | 6.4 | A5V | HU 295 |
discoverer information:
| discoverer code | discoverer | reference |
| HU 295 | Hussey, W.J. | - |
notes:
| note | 97 Aqr. P = 63.2yr., a = 0.42", motion direct. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 23h 17.4min | DEC: -15° 36' |
magnitudes, spectral classes, orbital elements:
| author: | W.H. van den Bos |
| date of observation: | 1952 |
| magnitude of component A: | 5.6 |
| magnitude of component B: | 5.6 |
| spectral class component B: | A5Vn |
| spectral class component B: | A5Vn |
| period [y]: | 63.16 |
| semi-major axis [arcsec]: | 0.42 |
| inclination [deg]: | 78 |
| node [deg]: | 99 |
| eccentricity: | 0.12 |
| time of periastron passage: | 1942 |
| dates of ephemeris: | 1 rev. |
| grade: | good |
| reference: | Union Obs. Circ. 6, 218; 1953. |
| other name(s) | HU 295, 97 Aqr |