NSV 00444
catalogues and names
| catalogues and names | NSV 00444, HR 363, HD 7351, SAO 74576, BD +27 196 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 1h 14min 5sec | DEC: +28° 31' 47'' | ||
| position (B1900) | RA: 1h 8min 35sec | DEC: +28° 0' 4'' | ||
| proper motion (J2000) | RA: 0.079 arcsec/a | DEC: -0.049 arcsec/a | ||
| radial velocity | 2 km/s note: spectroscopic binaries |
|||
| galactic coordinates | longitude: 128.94° | latitude: -34.08° | ||
magnitude
| visual magnitude | 6.43 (V on UBV Johnson system) |
spectral / color information
| spectral class | S3+/2- |
| B-V-magnitude | 1.7 |
| U-B-magnitude | 1.87 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
| note (category: spectra): | Also classified S3 Zr1 Ti3. |
variability information
| variable star identification | 444 |
| note (category: variability): | SRb?, amp. 0.15V. |
miscellaneous information
| note (category: group membership): | Sigma Pup group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 1h 14min 4.909sec | DEC: +28° 31' 46.19'' | ±0.35 arcsec | source: 34 |
| proper motion (J2000) | RA: 0.0047 arcsec/a | DEC: -0.06 arcsec/a | source: 25 | |
| radial velocity | 2 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 128.95° | latitude: -34.08° | ||
magnitude:
| visual | 6.43 (observed) | source: 25 |
| photovisual | 6.6 | source: 2 |
| photographic | 7.5 | source: 16 |
spectral information:
| spectral class | M0 | source: 96 | |
| Morgan-Keenan | S3+/2- | source: 25 | |
| B-magnitude | 8.13 ±0.05 | B-V-magnitude | 1.7 |
| U-magnitude | 10 ±0.05 | U-B-magnitude | 1.87 |
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 | |
| 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: 1h 11min 19.695sec | DEC: +28° 15' 57.59'' | ±0.05 arcsec |
| position (J2000) | RA: 1h 14min 5.02sec | DEC: +28° 31' 47.19'' | |
| proper motion B1950 (FK4) | RA: 0.006 arcsec/a | DEC: -0.044 arcsec/a | ±0.013 arcsec/a in RA ±0.012 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.006 arcsec/a | DEC: -0.049 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | M0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 1480 |
| Durchmusterung | BD+27 196 |
| Boss General Catalogue | 1480 |
| Henry Draper Catalogue | 7351 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 1h 11min 19.6sec | DEC: +28° 15' 57'' |
variability informations:
| variability type | SRB: | pulsating variable star |
| magnitute at max. brightness | 6.43 | |
| magnitute amplitude | 0.15 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | MS |
references
| to a study | 712679D (designation: HD 7351) |
variability type description
| variability type | description |
| SRB |
Semiregular variables, which are giants or supergiants of intermediate and late spectral types showing noticeable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20 to >2000 days, while the shapes of the light curves are rather different and variable, and the amplitudes may be from several hundredths to several magnitudes (usually 1-2 mag in V). SRA Semiregular late-type (M, C, S or Me, Ce, Se) giants displaying persistent periodicity and usually small (<2.5 mag in V) light amplitudes (Z Aqr). Amplitudes and light-curve shapes generally vary and periods are in the range of 35-1200 days. Many of these stars differ from Miras only by showing smaller light amplitudes; SRB Semiregular late-type (M, C, S or Me, Ce, Se) giants with poorly defined periodicity (mean cycles in the range of 20 to 2300 days) or with alternating intervals of periodic and slow irregular changes, and even with light constancy intervals (RR CrB, AF Cyg). Every star of this type may usually be assigned a certain mean period (cycle), which is the value given in the Catalogue. In a number of cases, the simultaneous presence of two or more periods of light variation is observed; SRC Semiregular late-type (M, C, S or Me, Ce, Se) supergiants (Mu Cep) with amplitudes of about 1 mag and periods of light variation from 30 days to several thousand days; SRD Semiregular variable giants and supergiants of F, G, or K spectral types, sometimes with emission lines in their spectra. Amplitudes of light variation are in the range from 0.1 to 4 mag, and the range of periods is from 30 to 1100 days (SX Her, SV UMa). |