i1Normae


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 i1Nor, HR 5961, HD 143474, SAO 243279, WDS 16035-5747A
constellation Norma

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


position, motion, parallax:

position (J2000) RA: 16h 3min 31,9sec DEC: -57 46' 31''
position (J1900) RA: 15h 55min 23,7sec DEC: -57 29' 36''
proper motion (J2000) RA: -0,124 arcsec/a DEC: -0,085 arcsec/a
radial velocity -14 km/s
note: variable radial velocity
rotational velocity 139 km/s (uncertain) (variable)
trigonometric parallax 0,023 arcsec
note (category: dynamical parallaxes): 0.026".

magnitude

visual magnitude 4,63
(V on UBV Johnson system)

spectral / color information

spectral class A7IV
B-V-magnitude 0,24
U-B-magnitude 0,09

double/multiple star system information

number of components of multiple star system 3
separation 0,5 arcsec
mag difference (of double or brightest multiple) 0,2
component ID AB
note Worley (1978) update of the IDS
note (category: double and multiple data): AB 5.3 A5V, 5.5 A6V, 26.93y, a = 0.366". C, 7.5v at 11". Combined mag., colors.

miscellaneous information

note (category: group membership): Hyades moving group.

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

position, motion, parallax:

position (J2000) RA: 16h 3min 31,777sec DEC: -57 46' 31,5'' 0,19 arcsec source: 16
proper motion (J2000) RA: -0,0196 arcsec/a DEC: -0,095 arcsec/a source: 25
radial velocity -14 km/s source: 25
trigonometric parallax 0,023 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 326,35 latitude: -3,92
GCI unit vector (J2000) X: -0,259476 Y: -0,46585 Z: -0,845964

magnitude:

visual 4,63 (observed) source: 25
photovisual 3,7 source: 16
photographic 4,9 source: 2

spectral information:

spectral class A2 source: 96
Morgan-Keenan A7IV source: 25
B-magnitude 4,87 0,05 B-V-magnitude 0,24
U-magnitude 4,96 0,05 U-B-magnitude 0,09

double/multiple star system information:

source of data: 19
magnitude difference between brightest and second brightest component 0,1

component magnitude spectral class catalogue(s)/name(s)
A 4,63 A2 i1Normae, HR 5961, HD 143474, SAO 243279
B 8,02 -

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: 15h 59min 27,038sec DEC: -57 38' 11,19'' 0,043 arcsec
position (J2000) RA: 16h 3min 31,947sec DEC: -57 46' 31,04''
proper motion J1950 (FK4) RA: -0,0148 arcsec/a DEC: -0,085 arcsec/a 0,01 arcsec/a in RA
0,007 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0155 arcsec/a DEC: -0,085 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,9 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class A2
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: 21535
Durchmusterung CP-57 7500AB
Boss General Catalogue 21535
Henry Draper Catalogue 143474

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

position and proper motion:

position (J2000) RA: 16h 3,5min DEC: -57 47'
proper motion (J2000) RA: -0,157 arcsec/a DEC: -0,095 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 1897 92 '' 5,3 5,4 A7IV SEE 258
AB-C 1836 28 252 10,1'' 4,64 8,02 - HJ 4825
1990 243 11''

discoverer information:

discoverer code discoverer reference
SEE 258 See, T.J. -
HJ 4825 Herschel, J. -

notes:

note Iota (1) Nor. P = 26.9yr., a = 0.37", motion retrograde. Proper motion of B -157 -095.