n Serpentis


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


catalogues and names n Ser, 53 Ser, HR 6446, HD 156928, SAO 160479, FK5: 3376, WDS 17208-1251A
constellation Serpens

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


position, motion, parallax:

position (J2000) RA: 17h 20min 49,7sec DEC: -12 50' 49''
position (J1900) RA: 17h 15min 12,1sec DEC: -12 44' 44''
proper motion (J2000) RA: 0,042 arcsec/a DEC: 0,004 arcsec/a
radial velocity 5 km/s
note: variable radial velocity
rotational velocity 115 km/s (uncertain) (variable)
trigonometric parallax 0,028 arcsec

magnitude

visual magnitude 4,33
(V on UBV Johnson system)

spectral / color information

spectral class A2V
B-V-magnitude 0,03
U-B-magnitude 0,05
R-I-magnitude 0

double/multiple star system information

separation 46,3 arcsec
mag difference (of double or brightest multiple) 4,8

miscellaneous information

note (category: group membership): Possible Eggen group with HR 63, q.v.

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

position, motion, parallax:

position (J2000) RA: 17h 20min 49,651sec DEC: -12 50' 48,93'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0026 arcsec/a DEC: -0,002 arcsec/a source: 25
radial velocity 5 km/s source: 25
trigonometric parallax 0,028 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 10,63 latitude: 13,46
GCI unit vector (J2000) X: -0,165833 Y: -0,960761 Z: -0,222347

magnitude:

visual 4,33 (observed) source: 25
photovisual 4 source: 16
photographic 4,4 source: 2

spectral information:

spectral class A0 source: 96
Morgan-Keenan A2V source: 25
B-magnitude 4,36 0,05 B-V-magnitude 0,03
U-magnitude 4,41 0,05 U-B-magnitude 0,05

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 46,3 arcsec
magnitude difference between brightest and second brightest component 4,85
position angle 28

component magnitude spectral class catalogue(s)/name(s)
A 4,33 A0 n Serpentis, 53 Ser, HR 6446, HD 156928, SAO 160479
B 8,7 -

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
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: 17h 18min 0,746sec DEC: -12 47' 52,08'' 0,019 arcsec
position (J2000) RA: 17h 20min 49,657sec DEC: -12 50' 48,26''
proper motion J1950 (FK4) RA: 0,0029 arcsec/a DEC: 0,004 arcsec/a 0,003 arcsec/a in RA
0,003 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0031 arcsec/a DEC: 0,007 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class A0
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: 23424
Durchmusterung BD-12 4722
Boss General Catalogue 23424
Henry Draper Catalogue 156928

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

position and proper motion:

position (J2000) RA: 17h 20,8min DEC: -12 51'
proper motion (J2000) RA: 0,042 arcsec/a DEC: 0,004 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
- 1863 9 32 48,1'' 4,33 9,18 A2V SHJ 247
1959 28 46,3''

discoverer information:

discoverer code discoverer reference
SHJ 247 South & Herschel -

notes:

note Nu Ser. B is BD-12@4724. Proper motion of B +021 +008.