Meissa


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. The Washington Visual Double Star Catalog, 1996.0

  5. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names Meissa, l Ori, NSV 02240, 39 Ori, HR 1879, HD 36861, SAO 112921, WDS 05351+0956A
other names Heka
constellation Orion

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

note (category: star names): Meissa; Heka.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 5h 35min 8,3sec DEC: +9 56' 3''
position (J1900) RA: 5h 29min 37,7sec DEC: +9 52' 2''
proper motion (J2000) RA: 0 arcsec/a DEC: -0,006 arcsec/a
radial velocity 34 km/s
rotational velocity 66 km/s (uncertain) (variable)
trigonometric parallax 0,007 arcsec
note (category: dynamical parallaxes): 0.001".

magnitude

visual magnitude 3,54
(V on UBV Johnson system)

spectral / color information

spectral class O8III((f))
B-V-magnitude -0,18
U-B-magnitude -1,03
R-I-magnitude -0,17
note (category: colors): Color excess E(B-V) = +0.12.

variability information

variable star identification 2240
note (category: variability): Uncertain which of HR 1879 or 1880 is the variable suspect.

double/multiple star system information

number of components of multiple star system 4
separation 4,4 arcsec
mag difference (of double or brightest multiple) 2
component ID AB
note (category: double and multiple data): A,B,C fixed. B is HR 1880. Colors for combined light. Blended mag., 3.39V. C is 11.2v at 29", optical; D, 11.2 at 78".

miscellaneous information

note (category: group membership): In cluster Collinder 69; exciting star of HII region S264; in Lambda Ori assoc. Lambda Ori and surroundings are at same distance as Ori OB1 assoc. but are not members. Lambda Ori member surrounded by expanding HII region.

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

position, motion, parallax:

position (J2000) RA: 5h 35min 8,25sec DEC: +9 56' 2,6'' 0,76 arcsec source: 18
proper motion (J2000) RA: -0,0003 arcsec/a DEC: -0,005 arcsec/a source: 25
radial velocity 34 km/s source: 25
trigonometric parallax 0,007 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 195,06 latitude: -12
GCI unit vector (J2000) X: 0,106647 Y: 0,979217 Z: 0,172515

magnitude:

visual 3,54 (observed) source: 25
photovisual 3,7 source: 2
photographic 3,5 source: 16

spectral information:

spectral class O0 source: 96
Morgan-Keenan O8III((f)) source: 25
B-magnitude 3,36 0,05 B-V-magnitude -0,18
U-magnitude 2,33 0,05 U-B-magnitude -1,03

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 4,4 arcsec
magnitude difference between brightest and second brightest component 1,9
position angle 43

component magnitude spectral class catalogue(s)/name(s)
A 3,54 O0 Meissa, l Orionis, 39 Ori, HR 1879, HD 36861, SAO 112921
B 5,61 - l Orionis, 39 Ori, HR 1880, HD 36862,

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
18 Hipparcos Input Catalog Version 2 Annex
Turon, C., et al., "The Hipparcos Input Catalog, Version 2," Centre de Donnees Stellaires Information Bulletin, Vol. 43, p. 5, 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: 5h 32min 22,913sec DEC: +9 54' 8,35'' 0,022 arcsec
position (J2000) RA: 5h 35min 8,26sec DEC: +9 56' 2,56''
proper motion J1950 (FK4) RA: -0,0001 arcsec/a DEC: -0,005 arcsec/a 0,003 arcsec/a in RA
0,003 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0 arcsec/a DEC: -0,006 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,7 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class Oe5
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: 6915
Durchmusterung BD+09 879
Boss General Catalogue 6915
Henry Draper Catalogue 36861
The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 5h 35,1min DEC: +9 56'
proper motion (J2000) RA: 0,001 arcsec/a DEC: -0,005 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
AB 1821 often 43 4,4'' 3,7 5,6 O8 B0.5V STF 738
AC 1880 12 184 28,6'' 3,7 10,72 - STF 738
AD 1905 3 271 78,3'' 3,7 11,2 - STF 738
AE 1905 1 278 151,8'' - - - GUI

discoverer information:

discoverer code discoverer reference
STF 738 Struve, F.G.W. -
GUI Guillaume, J.

notes:

note Lambda Ori.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 5h 32min 22,9sec DEC: +9 54' 8''

variability informations:

magnitute at max. brightness 3,38
magnitute at min. brightness 3,54
photometric system visual, photovisual or Johnson's V

spectral information

spectral class O8

references

to a study 0807D (designation: 101G ORI)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).