V0700 Monocerotis

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

position, motion, parallax:

position (J2000)	RA: 6h 33min 5.175sec	DEC: +10° 19' 19.37''	ą0.43 arcsec	source: 16
position (2000.74)	RA: 6h 33min 7sec	DEC: +10° 19' 17''	JD: 2451813.20
proper motion (J2000)	RA: -0.0001 arcsec/a	DEC: -0.013 arcsec/a		source: 16
galactic coord. (B1950)	longitude: 201.67°	latitude: 0.67°

magnitude:

visual	8.72 (observed)	source: 20
photographic	8.6	source: 16

spectral information:

spectral class	B3		source: 96
B-magnitude	8.99 ą0.016	B-V-magnitude	0.27
U-magnitude	8.45 ą0.011	U-B-magnitude	-0.54

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
20	Catalogue of Homogeneous Means in the UBV System
Mermilliod, J.C., Catalogue of Homogeneous Means in the UBV System, Institut d'Astronomie, Universite de Lausanne, 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 (B1950)	RA: 6h 30min 19.367sec	DEC: +10° 21' 38.17''	ą0.019 arcsec
position (2000.74)	RA: 6h 33min 7sec	DEC: +10° 19' 18''	JD: 2451813.20
position (J2000)	RA: 6h 33min 5.116sec	DEC: +10° 19' 19.47''
proper motion B1950 (FK4)	RA: -0.0014 arcsec/a	DEC: -0.011 arcsec/a	ą0.011 arcsec/a in RA ą0.007 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0013 arcsec/a	DEC: -0.01 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	8.8 (accuracy: 1 decimal)
source of visual magnitude data	Taken from AGK1.

spectral information:

spectral class	B3
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	Yale Transactions 19, catalogue number: 2332
Durchmusterung	BD+10 1172
Henry Draper Catalogue	259431

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

position:

position (equinox 1950.0)

RA: 6h 30min 19.4sec

DEC: +10° 21' 38''

variability informations:

variability type	INA	eruptive variable star
magnitute at max. brightness	8.62
magnitute at min. brightness	8.91
photometric system	visual, photovisual or Johnson's V

references

to a study	K.G.Dzhakusheva, K.S.Kuratov, D.B.Mukanov, Yu.K.Bergner, A.S.Miroshnichenko, R.V.Yudin, N.Yu. Yutanov, Soviet Astronomy Letters 14, No.4, 317, 1988 = Astr Zh Pisma (USSR) 14, No.8, 744, 1988.
to a chart/photograph	G.H.Herbig, ApJ Suppl 4, No.43, 337, 1960.

miscanellous

ID in the GCVS catalogue	55/700
constellation	Monoceros
notes on existence	The star is equivalent to '72101'.

variability type description

variability type

description

INA

Orion variables. Irregular, eruptive variables connected with bright or dark diffuse nebulae or observed in the regions of these nebulae. Some of them may show cyclic light variations caused by axial rotation. In the Spectrum-Luminosity diagram, they are found in the area of the main sequence and subgiants. They are probably young objects that, during the course of further evolution, will become light-constant stars on the zero-age main
sequence (ZAMS). The range of brightness variations may reach several magnitudes. In the case of rapid light variations having been observed (up to 1 mag in 1-10 days), the letter "S" is added to the symbol for the type (INS).
This type may be divided into the following subtypes: INA, INB, INT, IN(YY).

INA
Orion variables of early spectral types (B-A or Ae). They are often characterized by occasional abrupt Algol-like fadings (T Ori);

INB
Orion variables of intermediate and late spectral types, F-M or Fe-Me (BH Cep, AH Ori). F-type stars may show Algol-like fadings similar to those of many INA stars; K-M stars may produce flares along with irregular light variations;

INT
Orion variables of the T Tauri type. Stars are assigned to this type on the basis of the following (purely spectroscopic) criteria: spectral types are in the range Fe-Me. The spectra of most typical stars resemble the spectrum of the solar chromosphere. The feature specific to the type is the presence of
the flourescent emission lines Fe II 4046, 4132 A (anomalously intense in the spectra of these stars), emission lines [Si II] and [O I], as well as the absorption line Li I 6707 A. These variables are usually observed only in diffuse nebulae. If it is not apparent that the star is associated with a nebula, the letter "N" in the symbol for the type may be omitted, e.g., IT (RW AUR);

IN(YY)
Some Orion variables (YY Ori) show the presence of absorption components on the redward sides of emission lines, indicating the infall of matter toward the stars' surfaces. In such cases, the symbol for the type may be accompanied by the symbol "YY".