25 Aquarii
catalogues and names
| catalogues and names | 25 Aqr, HR 8277, HD 206067, SAO 126965, BD +1 4517, FK5: 3729, WDS 21396+0215 |
| constellation | Aquarius |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 21h 39min 33.3sec | DEC: +2° 14' 37'' | ||
| position (B1900) | RA: 21h 34min 28.8sec | DEC: +1° 47' 38'' | ||
| proper motion (J2000) | RA: -0.026 arcsec/a | DEC: -0.082 arcsec/a | ||
| radial velocity | -35 km/s note: variable radial velocity |
|||
| rotational velocity | <19 km/s | |||
| trigonometric parallax | 0.006 arcsec | |||
| galactic coordinates | longitude: 57.54° | latitude: -35.28° | ||
magnitude
| visual magnitude | 5.1 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0III |
| B-V-magnitude | 1.04 |
| U-B-magnitude | 0.9 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
| separation | 136.8 arcsec |
| mag difference (of double or brightest multiple) | 6.3 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 21h 39min 33.247sec | DEC: +2° 14' 37.12'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0022 arcsec/a | DEC: -0.078 arcsec/a | source: 25 | |
| radial velocity | -35 km/s | source: 25 | ||
| trigonometric parallax | 0.006 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 57.55° | latitude: -35.28° | ||
magnitude:
| visual | 5.1 (observed) | source: 25 |
| photovisual | 5.3 | source: 2 |
| photographic | 6.5 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K0III | source: 25 | |
| B-magnitude | 6.14 ±0.05 | B-V-magnitude | 1.04 |
| U-magnitude | 7.04 ±0.05 | U-B-magnitude | 0.9 |
double/multiple star system information:
| separation between brightest and second brightest component | 136.8 arcsec |
| magnitude difference between brightest and second brightest component | 6.5 |
| position angle | 45 ° |
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 | |
| 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: 21h 37min 1.044sec | DEC: +2° 1' 4.24'' | ±0.018 arcsec |
| position (J2000) | RA: 21h 39min 33.293sec | DEC: +2° 14' 36.62'' | |
| proper motion B1950 (FK4) | RA: -0.0019 arcsec/a | DEC: -0.081 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0017 arcsec/a | DEC: -0.085 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 | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 30315 |
| Durchmusterung | BD+01 4517 |
| Boss General Catalogue | 30315 |
| Henry Draper Catalogue | 206067 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 21h 39.6min | DEC: +2° 15' |
| proper motion (J2000) | RA: -0.026 arcsec/a | DEC: -0.082 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 |
| - | 1911 | 2 | 45° | 132.6'' | 5.1 | 11.6 | K0III | BUP 229 |
| 1960 | - | 136.8'' |
discoverer information:
| discoverer code | discoverer | reference |
| BUP 229 | - | - |
notes:
| note | 25 Aqr. |