Asellus Tertius

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 (Vol. I-III)

catalogues and names Asellus Tertius, k2Boo, kap 2 Boo, 17 Boo, HR 5329, HD 124675, SAO 29046, WDS 14135+5147A
constellation Bootes

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

note (category: star names): Asellus Tertius.

position, motion, parallax:

position (J2000) RA: 14h 13min 29sec DEC: +51 47' 25''
position (J1900) RA: 14h 9min 54sec DEC: +52 15' 27''
proper motion (J2000) RA: 0,063 arcsec/a DEC: -0,002 arcsec/a
radial velocity -17 km/s
note: spectroscopic binaries
rotational velocity 127 km/s (uncertain) (variable)
trigonometric parallax 0,01 arcsec
note (category: dynamical parallaxes): 0.017".


visual magnitude 4,54
(V on UBV Johnson system)

spectral / color information

spectral class A8IV
B-V-magnitude 0,2
U-B-magnitude 0,14
R-I-magnitude 0,12

variability information

variable star identification Kap2 Boo
note (category: variability): ADS 9173A, Delta Sct 4.50 - 4.58V, 0.06682 or 0.076242d. Possible beat period of about 16d.

double/multiple star system information

separation 13,4 arcsec
mag difference (of double or brightest multiple) 2,2
note (category: double and multiple data): Binary with HR 5328.

miscellaneous information

note (category: group membership): Sirius group? UMa stream.

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

position, motion, parallax:

position (J2000) RA: 14h 13min 28,951sec DEC: +51 47' 24,27'' 0,2 arcsec source: 52
proper motion (J2000) RA: 0,0053 arcsec/a DEC: -0,002 arcsec/a source: 25
radial velocity -17 km/s source: 25
trigonometric parallax 0,01 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 96,45 latitude: 60,91
GCI unit vector (J2000) X: -0,516565 Y: -0,340232 Z: 0,78575


visual 4,5 (observed) source: 31
photovisual 4,6 source: 2
photographic 4,7 source: 16

spectral information:

spectral class A5 source: 29
Morgan-Keenan A8IV source: 25
B-magnitude 4,74 0,05 B-V-magnitude 0,2
U-magnitude 4,88 0,05 U-B-magnitude 0,14

variability information:

source of data: 30
variability type 10
var. amplitude 0,08
var. period 0,08

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 13,4 arcsec
magnitude difference between brightest and second brightest component 2,15
position angle 236

component magnitude spectral class catalogue(s)/name(s)
A 4,5 A5 Asellus Tertius, k2Bootis, 17 Boo, HR 5329, HD 124675, SAO 29046
B 6,69 A5 k1Bootis, 17 Boo, HR 5328, HD 124674, SAO 29045


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
29 SAOJ2000
SAO on FK5 at J2000, 1989
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
52 PPMN-HP subset
PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H)

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (J1950) RA: 14h 11min 41,518sec DEC: +52 1' 23,55'' 0,016 arcsec
position (J2000) RA: 14h 13min 29,026sec DEC: +51 47' 24,55''
proper motion J1950 (FK4) RA: 0,0063 arcsec/a DEC: -0,007 arcsec/a 0,003 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0068 arcsec/a DEC: -0,002 arcsec/a
source of proper motion data Determined by source catalog


visual 4,6 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class A5
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)


source catalogue GC, catalogue number: 19207
Durchmusterung BD+52 1782A
Boss General Catalogue 19207
Henry Draper Catalogue 124675

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

position and proper motion:

position (J2000) RA: 14h 13,5min DEC: +51 47'
proper motion (J2000) RA: 0,063 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
- 1832 70 238 12,6'' 4,54 6,69 A7V F1V STF1821
1973 236 13,4''

discoverer information:

discoverer code discoverer reference
STF1821 Struve, F.G.W. -


note Kappa Boo. A is a Delta Scuti-type system. B is a long- period spectroscopic binary with P = 1791.2d. Proper motion of B +103 -012.

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


position (J1950) RA: 14h 11min 41,5sec DEC: +52 1' 24''

variability informations:

variability type DSCTC pulsating variable star
magnitute at max. brightness 4,5
magnitute at min. brightness 4,58
photometric system visual, photovisual or Johnson's V
period [d] 0,076242
rising time 50 % of period

spectral information

spectral class A8IV


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'


ID in the GCVS catalogue 9/90102
constellation Bootes
notes on existence The star is equivalent to '0099014 ksi'.
There are notes in published catalog.

variability type description

variability type description
DSCTC Variables of the Delta Scuti type. These are pulsating variables of spectral types A0-F5 III-V displaying light amplitudes from 0.003 to 0.9 mag in V (usually several hundredths of a magnitude) and periods from 0.01 to 0.2 days. The shapes of the light curves, periods, and amplitudes usually vary greatly. Radial as well as nonradial pulsations are observed. The variability of some
members of this type appears sporadically and sometimes completely ceases, this being a consequence of strong amplitude modulation with the lower value of the amplitude not exceeding 0.001 mag in some cases. The maximum of the surface layer expansion does not lag behind the maximum light for more than 0.1 periods. DSCT stars are representatives of the galactic disk (flat component) and are phenomenologically close to the SX Phe variables.

Low amplitude group of Delta Sct variables (light amplitude <0.1 mag in V). The majority of this type's representatives are stars of luminosity class V; objects of this subtype generally are representative of the Delta Sct variables in open clusters.