S Car


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. Combined General Catalogue of Variable Stars (Vol. I-III)


catalogues and names S Car, HR 3999, HD 88366, SAO 250840

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)


position, motion, parallax:

position (J2000) RA: 10h 9min 21,9sec DEC: -61 32' 57''
position (J1900) RA: 10h 6min 10,6sec DEC: -61 3' 35''
proper motion (J2000) RA: -0,094 arcsec/a DEC: 0,073 arcsec/a
radial velocity 289 km/s
note: suspected variable radial velocity

magnitude

visual magnitude 5,6
(V on UBV Johnson system)

spectral / color information

spectral class M2-3IIIe
B-V-magnitude 1,6
U-B-magnitude 1,75
R-I-magnitude 1,54
note (category: spectra): Also classified K5e-M6e.

variability information

variable star identification S Car
note (category: variability): M 4.5 - 9.9v, 149.49d.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000) RA: 10h 9min 21,879sec DEC: -61 32' 56,69'' 0,19 arcsec source: 16
proper motion (J2000) RA: -0,0128 arcsec/a DEC: 0,071 arcsec/a source: 25
radial velocity 289 km/s source: 25
galactic coord. (B1950) longitude: 284,85 latitude: -4,51
GCI unit vector (J2000) X: -0,421966 Y: 0,22115 Z: -0,879226

magnitude:

visual 5,6 (observed) source: 25
photovisual 7,2 source: 16

spectral information:

spectral class M0 source: 96
Morgan-Keenan M2-3IIIe source: 25
B-magnitude 7,2 0,05 B-V-magnitude 1,6
U-magnitude 8,95 0,05 U-B-magnitude 1,75

variability information:

source of data: 30
variability type 180
var. amplitude 5,4
var. period 149,49
var. epoch 2442112
5. March 1974, 12:00:00 UT
next max light 2451679,36
14. May 2000, 20:38:24 UT

sources:

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
30 GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
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 (J1950) RA: 10h 7min 46,152sec DEC: -61 18' 14,15'' 0,034 arcsec
position (J2000) RA: 10h 9min 21,874sec DEC: -61 32' 56,82''
proper motion J1950 (FK4) RA: -0,0129 arcsec/a DEC: 0,07 arcsec/a 0,008 arcsec/a in RA
0,007 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0132 arcsec/a DEC: 0,073 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,4 (accuracy: 1 decimal)
source of visual magnitude data Source cited in source catalog introduction.

spectral information:

spectral class M2e
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Variable star in visual magnitude in source catalog

catalogues

source catalogue GC, catalogue number: 13971
Durchmusterung CP-60 1701
Boss General Catalogue 13971
Henry Draper Catalogue 88366

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (J1950) RA: 10h 7min 46,2sec DEC: -61 18' 14''

variability informations:

variability type M pulsating variable star
magnitute at max. brightness 4,5
magnitute at min. brightness 9,9
photometric system visual, photovisual or Johnson's V
epoch for maximum light [JD] 2442112
5. March 1974, 12:00:00 UT
period [d] 149,49
next maximum light [JD] 2451679,36
14. May 2000, 20:38:24 UT
rising time 51 % of period

spectral information

spectral class K5e-M6e

references

to a study the main characteristics of the star was determined by the authors themselves
to a chart/photograph Vol. I GCVS (see Kholopov et al. 1985-1988)

miscanellous

ID in the GCVS catalogue 17/2
constellation Carina
notes on existence The star is equivalent to '0170003 T'.

variability type description

variability type description
M Mira (Omicron) Ceti-type variables. These are long-period variable giants with characteristic late-type emission spectra (Me, Ce, Se) and light amplitudes from 2.5 to 11 mag in V. Their periodicity is well pronounced, and the periods lie in the range between 80 and 1000 days. Infrared amplitudes are usually less than in the visible and may be <2.5 mag. For example, in the K band they
usually do not exceed 0.9 mag. If the amplitudes exceed 1 - 1.5 mag , but it is not certain that the true light amplitude exceeds 2.5 mag, the symbol "M" is followed by a colon, or the star is attributed to the semiregular class with a colon following the symbol for that type (SR).