d Trianguli
catalogues and names
| catalogues and names | d Tri, 8 Tri, HR 660, HD 13974, SAO 55420, BD +33 395, WDS 02171+3413 |
| constellation | Triangulum |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 2h 17min 3.2sec | DEC: +34° 13' 27'' | ||
| position (B1900) | RA: 2h 10min 56.8sec | DEC: +33° 46' 0'' | ||
| proper motion (J2000) | RA: 1.154 arcsec/a | DEC: -0.245 arcsec/a | ||
| radial velocity | -6 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible |
|||
| rotational velocity | =<10 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.093 arcsec | |||
| galactic coordinates | longitude: 142.43° | latitude: -25.39° | ||
magnitude
| visual magnitude | 4.87 (V on UBV Johnson system) |
spectral / color information
| spectral class | G0.5V |
| B-V-magnitude | 0.61 |
| U-B-magnitude | 0.02 |
| R-I-magnitude |
double/multiple star system information
| separation | 65.4 arcsec |
| mag difference (of double or brightest multiple) | 8.5 |
| note (category: double and multiple data): | Probably optical. |
| note (category: spectroscopic binaries): | ADS 1739A, 10.0201d, K 9.4k/s, V0 -5.9k/s, asini 1.295. |
miscellaneous information
| note (category: group membership): | Zeta Her group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 17min 3.216sec | DEC: +34° 13' 27.8'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: 0.0928 arcsec/a | DEC: -0.237 arcsec/a | source: 25 | |
| radial velocity | -6 km/s | source: 25 | ||
| trigonometric parallax | 0.093 arcsec | ±0.009 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 142.43° | latitude: -25.39° | ||
magnitude:
| visual | 4.87 (observed) | source: 25 |
| photovisual | 5.1 | source: 2 |
| photographic | 5.6 | source: 16 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | G0.5V | source: 25 | |
| B-magnitude | 5.48 ±0.05 | B-V-magnitude | 0.61 |
| U-magnitude | 5.5 ±0.05 | U-B-magnitude | 0.02 |
double/multiple star system information:
| separation between brightest and second brightest component | 65.4 arcsec |
| magnitude difference between brightest and second brightest component | 8.7 |
| position angle | 337 ° |
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: 2h 13min 59.614sec | DEC: +33° 59' 47.61'' | ±0.013 arcsec |
| position (J2000) | RA: 2h 17min 3.24sec | DEC: +34° 13' 27.4'' | |
| proper motion B1950 (FK4) | RA: 0.0928 arcsec/a | DEC: -0.237 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.093 arcsec/a | DEC: -0.244 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 | G0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 2733 |
| Durchmusterung | BD+33 395 |
| Boss General Catalogue | 2733 |
| Henry Draper Catalogue | 13974 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 17.1min | DEC: +34° 13' |
| proper motion (J2000) | RA: 0 arcsec/a | DEC: -0.247 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 |
| - | 1902 | 2 | 342° | 62.6'' | 4.87 | 13.6 | F9V | DOR 66 |
| 1907 | 337° | 65.4'' |
discoverer information:
| discoverer code | discoverer | reference |
| DOR 66 | - | - |
notes:
| note | Delta Tri. A is a double-lined spectroscopic binary, P = 10.02d. Proper motion +1154 -247. |