catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names

catalogues and names	V1286 Aql, 10 Aql, HR 7167, HD 176232, SAO 104303, BD +13 3838
constellation	Aquila

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

position, motion, parallax:

position (J2000)	RA: 18h 58min 46.9sec	DEC: +13° 54' 24''
position (B1900)	RA: 18h 54min 11.4sec	DEC: +13° 46' 20''
proper motion (J2000)	RA: -0.002 arcsec/a	DEC: -0.052 arcsec/a
radial velocity	15 km/s
rotational velocity	=<6 km/s (uncertain) (variable)
galactic coordinates	longitude: 46.16°	latitude: 4.7°

magnitude

visual magnitude

5.89 (V on UBV Johnson system)

spectral / color information

spectral class	F0pSrEu
B-V-magnitude	0.25
U-B-magnitude	0.09

note (category: spectra):

Oxygen deficient relative to magnesium. Magnetic star. Also classified A4p.

variability information

variable star identification

V1286 Aql

note (category: variability):

Alpha CV 5.83 - 5.93V. Published periods of 6.05 and 9.78d probably spurious; nor does a more recent 6.5386d satisfy all observations. Period may be years. Abt and Golson found range 5.83 - 5.91V. Two isolated obs. of 5.93 and 5.94V, while other observers report intermediate values with amp. <0.015V.

miscellaneous information

note (category: group membership):

Sirius group?

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

position, motion, parallax:

position (J2000)	RA: 18h 58min 46.934sec	DEC: +13° 54' 24.01''	±0.35 arcsec	source: 17
proper motion (J2000)	RA: 0.0001 arcsec/a	DEC: -0.049 arcsec/a		source: 25
radial velocity	15 km/s			source: 25
galactic coord. (B1950)	longitude: 46.17°	latitude: 4.7°

magnitude:

visual	5.8 (observed)	source: 31
photovisual	5.9	source: 2
photographic	6.1	source: 16

spectral information:

spectral class	A3		source: 96
Morgan-Keenan	F0pSrEu		source: 25
B-magnitude	6.14 ±0.05	B-V-magnitude	0.25
U-magnitude	6.23 ±0.05	U-B-magnitude	0.09

variability information:

source of data: 30

variability type	160
var. amplitude	0.1
var. period	6.05
var. epoch	2441517 18. July 1972, 12:00:00 UT
next max light	2452219.45 5. November 2001, 22:48:00 UT

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
17	ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991
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
31	CRM' (non-GCVS variable data)
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: 18h 56min 29.112sec	DEC: +13° 50' 16.88''	±0.014 arcsec
position (J2000)	RA: 18h 58min 46.904sec	DEC: +13° 54' 23.71''
proper motion B1950 (FK4)	RA: -0.0003 arcsec/a	DEC: -0.051 arcsec/a	±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0002 arcsec/a	DEC: -0.052 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	A3p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 26064
Durchmusterung	BD+13 3838
Boss General Catalogue	26064
Henry Draper Catalogue	176232

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

position:

position (equinox 1950.0)

RA: 18h 56min 29.1sec

DEC: +13° 50' 17''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	5.83
magnitute at min. brightness	5.93
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2441517.4 18. July 1972, 21:36:00 UT
period [d]	6.05
next maximum light [JD]	2452219.85 6. November 2001, 08:24:00 UT

spectral information

spectral class

A4p(Eu-Cr-Sr)

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	5/1286
constellation	Aquila
notes on existence	The star is equivalent to '0051287 V1287'.
There are notes in published catalog.

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.