catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

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

catalogues and names

catalogues and names	HI Aqr, 74 Aqr, HR 8704, HD 216494, SAO 165359, BD -12 6371, WDS 22535-1137
constellation	Aquarius

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

position, motion, parallax:

position (J2000)	RA: 22h 53min 28.7sec	DEC: -11° 37' 0''
position (B1900)	RA: 22h 48min 12.8sec	DEC: -12° 8' 54''
proper motion (J2000)	RA: 0.025 arcsec/a	DEC: 0.001 arcsec/a
radial velocity	-7 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible
rotational velocity	5 km/s (uncertain) (variable)
galactic coordinates	longitude: 56.42°	latitude: -58.28°

magnitude

visual magnitude

5.8 (V on UBV Johnson system)

spectral / color information

spectral class	B9III
B-V-magnitude	-0.08
U-B-magnitude	-0.31
R-I-magnitude

note (category: spectra):

Hg, Mn.

variability information

variable star identification

HI Aqr

note (category: variability):

Alpha CV, amp. 0.005V. Possible periods 0.724, 1.27, 3.40, 1.70d.

double/multiple star system information

separation	0.1 arcsec
mag difference (of double or brightest multiple)	0.5
note	doublicity discoverd by speckle interferometry

note (category: double and multiple data):

Mag., colors for combined light. Occultation double 6.7, 6.7v sep. 0.2"; speckle interferometry, sep. 0.076".

note (category: spectroscopic binaries):

3.4298d, K 95.3k/s, V0 -7.1k/s, msin3i 1.81, asini 4.49. Shortest known period for an Mn star. Both components show mercury lines; only primary, manganese.

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

position, motion, parallax:

position (J2000)	RA: 22h 53min 28.711sec	DEC: -11° 36' 59.54''	±0.19 arcsec	source: 16
proper motion (J2000)	RA: 0.0017 arcsec/a	DEC: 0 arcsec/a		source: 25
radial velocity	-7 km/s			source: 25
galactic coord. (B1950)	longitude: 56.44°	latitude: -58.28°

magnitude:

visual	5.8 (observed)	source: 25
photovisual	6.1	source: 16
photographic	5.9	source: 2

spectral information:

spectral class	B9		source: 96
Morgan-Keenan	B9III		source: 25
B-magnitude	5.72 ±0.05	B-V-magnitude	-0.08
U-magnitude	5.41 ±0.05	U-B-magnitude	-0.31

variability information:

source of data: 27

variability type	160
var. amplitude	0

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.1 arcsec
position angle	336 °

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
27	Catalog of Red Magnitudes (CRM)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 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: 22h 50min 50.798sec	DEC: -11° 52' 58.34''	±0.014 arcsec
position (J2000)	RA: 22h 53min 28.713sec	DEC: -11° 36' 59.54''
proper motion B1950 (FK4)	RA: 0.0015 arcsec/a	DEC: 0.004 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0017 arcsec/a	DEC: 0.001 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5.9 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	B9
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 31918
Durchmusterung	BD-12 6371
Boss General Catalogue	31918
Henry Draper Catalogue	216494

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

position and proper motion:

position (J2000)	RA: 22h 53.5min	DEC: -11° 37'
proper motion (J2000)	RA: 0.022 arcsec/a	DEC: 0 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
-	1976	16	102°	0.1''	5.8	-	B9III	MCA 73
	1989		336°	-

discoverer information:

discoverer code	discoverer	reference
MCA 73	McAlister, H.A.	-

notes:

note	74 Aqr. A spectroscopic, occultation, and interfero- metric system. The interferometric pair is not the spectroscopic pair, so the system is at least triple. P = 19yr., a = 0.077", motion direct.

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

position:

position (equinox 1950.0)

RA: 22h 50min 50.8sec

DEC: -11° 52' 58''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	5.8
magnitute amplitude	0.005
photometric system	visual, photovisual or Johnson's V

references

to a study	G.Mathys, J.Manfroid, AsAp Suppl 60,No.1,17,1985.
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	4/210
constellation	Aquarius
notes on existence	The star is equivalent to '68647'.

variability type description

variability type

description

ACV

Alpha2 Canum Venaticorum variables. These are main-sequence stars with spectral types B8p-A7p and displaying strong magnetic fields. Spectra show abnormally strong lines of Si, Sr, Cr, and rare earths whose intensities vary with rotation. They exhibit magnetic field and brightness changes (periods of 0.5-160 days or more). The amplitudes of the brightness changes are usually withine 0.01-0.1 mag in V. ACVO Rapidly oscillating Alpha2 CVn variables. These are nonradially pulsating, rotating magnetic variables of Ap spectral type (DO Eri). Pulsation periods are in the range of 6-12 mmag (0.004-0.01 days), while amplitudes of light variation caused by the pulsation are about 0.01 mag in V. The pulsational variations are superposed on those caused by rotation.