d 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

  5. 4th Catalog of Orbits of Visual Binaries

catalogues and names d Ser, 13 Ser, HR 5788, HD 138917, SAO 101623, WDS 15348+1032B
constellation Serpens

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


position, motion, parallax:

position (J2000) RA: 15h 34min 48,1sec DEC: +10° 32' 15''
position (J1900) RA: 15h 30min 1,4sec DEC: +10° 52' 19''
proper motion (J2000) RA: -0,074 arcsec/a DEC: -0,005 arcsec/a
radial velocity -38 km/s
note: suspected variable radial velocity
rotational velocity 70 km/s (uncertain) (variable)
trigonometric parallax 0,021 arcsec
note (category: dynamical parallaxes): 0.022".

magnitude

visual magnitude 3,8
(V on UBV Johnson system)

spectral / color information

spectral class F0IV
B-V-magnitude 0,26
U-B-magnitude 0,13

double/multiple star system information

number of components of multiple star system 4
separation 3,9 arcsec
mag difference (of double or brightest multiple) 1,1
component ID AB
note (category: double and multiple data): ADS 9701, 3168y, a = 5.8432". Binary with HR 5789, blended mag., colors.

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

position, motion, parallax:

position (J2000) RA: 15h 34min 48,157sec DEC: +10° 32' 15,08'' ±0,5 arcsec source: 25
proper motion (J2000) RA: -0,0051 arcsec/a DEC: 0,009 arcsec/a source: 25
radial velocity -38 km/s source: 25
trigonometric parallax 0,021 ±0,002 arcsec source: 25
galactic coord. (B1950) longitude: 17,59° latitude: 48,19°
GCI unit vector (J2000) X: -0,58202 Y: -0,792343 Z: 0,182879

magnitude:

visual 3,8 (observed) source: 25
photovisual 5,2 source: 2
photographic 4,1 source: 16

spectral information:

spectral class F0 source: 29
Morgan-Keenan F0IV source: 25
B-magnitude 4,06 ±0,05 B-V-magnitude 0,26
U-magnitude 4,19 ±0,05 U-B-magnitude 0,13

variability information:

source of data: 27
variability type 150
var. period 0,13

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 4,3 arcsec
magnitude difference between brightest and second brightest component 1
position angle 175 °

component magnitude spectral class catalogue(s)/name(s)
A 3,8 F0 d Serpentis, 13 Ser, HR 5789, HD 138918, SAO 101624
B 3,8 F0 d Serpentis, 13 Ser, HR 5788, HD 138917, SAO 101623

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
29 SAOJ2000
SAO on FK5 at J2000, 1989

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

position and proper motion:

position (J1950) RA: 15h 32min 24,633sec DEC: +10° 42' 12,66'' ±0,044 arcsec
position (J2000) RA: 15h 34min 48,099sec DEC: +10° 32' 14,94''
proper motion J1950 (FK4) RA: -0,0051 arcsec/a DEC: -0,007 arcsec/a ±0,008 arcsec/a in RA
±0,008 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,005 arcsec/a DEC: -0,005 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,2 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class F0
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: 20941
Durchmusterung BD+11 2821B
Boss General Catalogue 20941
Henry Draper Catalogue 138917

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

position and proper motion:

position (J2000) RA: 15h 34,8min DEC: +10° 32'
proper motion (J2000) RA: -0,071 arcsec/a DEC: -0,014 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
AB 1822 often 201° 2,4'' 4,2 5,2 F0IV STF1954
1990 175° 4,3''
AC 1911 3 12° 65,8'' 4,2 14,7 - STF1954
1959 14° 65,2''
CD 1911 1 339° 4,4'' 14,7 15,2 - STF1954

discoverer information:

discoverer code discoverer reference
STF1954 Struve, F.G.W. -

notes:

note Delta Ser. A premature orbit has been computed. The primary is a Delta Scuti-type variable.

data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)

position:

position (J1900) RA: 15h 30min DEC: +10° 52'

magnitudes, spectral classes, orbital elements:

author: J. Hopmann
magnitude of component A: 4,2
magnitude of component B: 4,2
spectral class component B: F0IV
spectral class component B: F0IV
period [y]: 3168
semi-major axis [arcsec]: 5,843
inclination [deg]: 112,6
node [deg]: 166,8
equinox of node: 1900
eccentricity: 0,31
time of periastron passage: 1700
dates of ephemeris: 1960-2000
grade: indeterminate
reference: Mitt. Wien No. 13, 1973.
notes Star A is a Delta Scuti type variable. A very faint pair CD (mag. about 14 estimated by Burnham, 4") is 65" distant and may be physical.