m1Crucis

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

catalogues and names m1Cru, NSV 19544, HR 4898, HD 112092, SAO 240366, WDS 12546-5710A
constellation Crux

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


position, motion, parallax:

position (J2000) RA: 12h 54min 35,6sec DEC: -57° 10' 40''
position (J1900) RA: 12h 48min 42,8sec DEC: -56° 38' 5''
proper motion (J2000) RA: -0,033 arcsec/a DEC: -0,006 arcsec/a
radial velocity 14 km/s
rotational velocity 48 km/s (uncertain) (variable)

magnitude

visual magnitude 4,03
(V on UBV Johnson system)

spectral / color information

spectral class B2IV-V
B-V-magnitude -0,17
U-B-magnitude -0,76
R-I-magnitude -0,24

double/multiple star system information

separation 34,9 arcsec
mag difference (of double or brightest multiple) 1
note Worley (1978) update of the IDS
note (category: double and multiple data): CPM with HR 4899.

miscellaneous information

note (category: group membership): Sco-Cen assoc.; probable member of Sco-Cen cluster; member of Pleiades group.

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

position, motion, parallax:

position (J2000) RA: 12h 54min 35,502sec DEC: -57° 10' 40,29'' ±0,19 arcsec source: 16
proper motion (J2000) RA: -0,0044 arcsec/a DEC: -0,012 arcsec/a source: 25
radial velocity 14 km/s source: 25
galactic coord. (B1950) longitude: 303,37° latitude: 5,69°
GCI unit vector (J2000) X: -0,526728 Y: -0,127895 Z: -0,840357

magnitude:

visual 4,03 (observed) source: 25
photovisual 4,3 source: 2
photographic 4,1 source: 2

spectral information:

spectral class B3 source: 96
Morgan-Keenan B2IV-V source: 25
B-magnitude 3,86 ±0,05 B-V-magnitude -0,17
U-magnitude 3,1 ±0,05 U-B-magnitude -0,76

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 34,9 arcsec
magnitude difference between brightest and second brightest component 1,14
position angle 17 °

component magnitude spectral class catalogue(s)/name(s)
A 4,03 B3 m1Crucis, HR 4898, HD 112092, SAO 240366
B 5,17 B3p m2Crucis, HR 4899, HD 112091, SAO 240367

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 (J1950) RA: 12h 51min 38,394sec DEC: -56° 54' 24'' ±0,025 arcsec
position (J2000) RA: 12h 54min 35,619sec DEC: -57° 10' 40,02''
proper motion J1950 (FK4) RA: -0,0036 arcsec/a DEC: -0,01 arcsec/a ±0,005 arcsec/a in RA
±0,004 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,004 arcsec/a DEC: -0,006 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,3 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class B3
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: 17512
Durchmusterung CP-56 5487A
Boss General Catalogue 17512
Henry Draper Catalogue 112092