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 q1Tau, NSV 16016, 77 Tau, HR 1411, HD 28307, SAO 93955, WDS 04287+1552B
constellation Taurus

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

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 4h 28min 34,5sec DEC: +15 57' 44''
position (J1900) RA: 4h 22min 51,6sec DEC: +15 44' 25''
proper motion (J2000) RA: 0,103 arcsec/a DEC: -0,027 arcsec/a
radial velocity 40 km/s
note: spectroscopic binaries, single lined spectra
rotational velocity =<8 km/s (uncertain) (variable)
trigonometric parallax 0,038 arcsec


visual magnitude 3,84
(V on UBV Johnson system)

spectral / color information

spectral class K0IIIbFe-0.5
B-V-magnitude 0,95
U-B-magnitude 0,73
R-I-magnitude 0,47
note (category: colors): Color excess E(B-V) = +0.09.

double/multiple star system information

number of components of multiple star system 4
separation 337,4 arcsec
mag difference (of double or brightest multiple) 0,4
component ID AB
note Worley (1978) update of the IDS
note (category: double and multiple data): CPM with HR 1412. Not clear if there are one or two occultation companions: mag. diff 3.8v, sep. 0.082", another possible mag. diff 8v, sep. 0.2".
note (category: spectroscopic binaries): 6000 or 3000d. Unresolved by speckle interferometry 1983.93.

miscellaneous information

note (category: group membership): In Hyades cluster; Mel 25 #71.
note (category: stellar radii or diameters): Diam. 0.0026".

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

position, motion, parallax:

position (J2000) RA: 4h 28min 34,477sec DEC: +15 57' 43,46'' 0,2 arcsec source: 52
proper motion (J2000) RA: 0,0069 arcsec/a DEC: -0,032 arcsec/a source: 25
radial velocity 40 km/s source: 25
trigonometric parallax 0,038 0,004 arcsec source: 25
galactic coord. (B1950) longitude: 180,26 latitude: -21,97
GCI unit vector (J2000) X: 0,373446 Y: 0,885953 Z: 0,275001


visual 3,84 (observed) source: 25
photovisual 4 source: 2
photographic 5 source: 16

spectral information:

spectral class K0 source: 96
Morgan-Keenan G9IIIFe-0.5 source: 25
B-magnitude 4,79 0,05 B-V-magnitude 0,95
U-magnitude 5,52 0,05 U-B-magnitude 0,73

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 0,2 arcsec
position angle 348

component magnitude spectral class catalogue(s)/name(s)
A 3,4 F0 q2Tauri, 78 Tau, HR 1412, HD 28319, SAO 93957
B 3,84 K0 q1Tauri, 77 Tau, HR 1411, HD 28307, SAO 93955


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
52 PPMN-HP subset
PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H)
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: 4h 25min 42,882sec DEC: +15 51' 10,15'' 0,014 arcsec
position (J2000) RA: 4h 28min 34,479sec DEC: +15 57' 43,83''
proper motion J1950 (FK4) RA: 0,0071 arcsec/a DEC: -0,026 arcsec/a 0,003 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0071 arcsec/a DEC: -0,027 arcsec/a
source of proper motion data Determined by source catalog


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

spectral information:

spectral class K0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue GC, catalogue number: 5433
Durchmusterung BD+15 631
Boss General Catalogue 5433
Henry Draper Catalogue 28307

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

position and proper motion:

position (J2000) RA: 4h 28,7min DEC: +15 52'
proper motion (J2000) RA: 0,108 arcsec/a DEC: -0,025 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
- 1836 8 346 337,4'' 3,4 - A7III STF 10

discoverer information:

discoverer code discoverer reference
STF 10 Struve, F.G.W. -


note Theta (2) Tau. B is BD+15@631. Proper motion of B +082 -026. A spectroscopic and occultation binary. Also, variable, probably of Delta Scuti type.