Porrima


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

  6. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names Porrima, g Vir, NSV 05859, 29 Vir, HR 4825, HD 110379, SAO 138917, WDS 12417-0127A
other names Arich in Becvar
constellation Virgo

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

note (category: star names): Porrima; Arich in Becvar.

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

position, motion, parallax:

position (J2000) RA: 12h 41min 39,6sec DEC: -1 26' 58''
position (J1900) RA: 12h 36min 35,5sec DEC: -0 54' 3''
proper motion (J2000) RA: -0,565 arcsec/a DEC: 0,012 arcsec/a
radial velocity -20 km/s
note: spectroscopic binaries
rotational velocity 28 km/s (uncertain) (variable)
trigonometric parallax 0,099 arcsec
note (category: dynamical parallaxes): 0.084".

magnitude

visual magnitude 3,65
(original HR magnitude)

spectral / color information

spectral class F0V
B-V-magnitude 0,36
U-B-magnitude -0,03
R-I-magnitude 0,19

variability information

variable star identification 5859
note (category: variability): Amp. 0.02V. Blend with 4826. Uncertain which component is the variable suspect.

double/multiple star system information

number of components of multiple star system 4
separation 4,1 arcsec
mag difference (of double or brightest multiple) 0,1
component ID AB
note (category: double and multiple data): AB 3.48 F0V, 3.50 F0V, 171.37y, a = 3.746". Speckle interferometric sep. 3.674", 1982.38. Combined mag. 2.75V. Colors for combined light. Component C, 15v at 53", optical.

miscellaneous information

note (category: stellar radii or diameters): Radius 1.5 solar.

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

position, motion, parallax:

position (J2000) RA: 12h 41min 39,595sec DEC: -1 26' 57,88'' 0,19 arcsec source: 33
proper motion (J2000) RA: -0,0377 arcsec/a DEC: 0,012 arcsec/a source: 25
radial velocity -20 km/s source: 25
trigonometric parallax 0,099 0,01 arcsec source: 25
galactic coord. (B1950) longitude: 297,87 latitude: 61,33
GCI unit vector (J2000) X: -0,98321 Y: -0,180718 Z: -0,025294

magnitude:

visual 3,48 (observed) source: 25
photovisual 3,7 source: 2
photographic 3,9 source: 2

spectral information:

spectral class F0 source: 96
Morgan-Keenan F0V source: 25
B-magnitude 3,84 0,05 B-V-magnitude 0,36
U-magnitude 3,81 0,05 U-B-magnitude -0,03

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 3,48 F0 Porrima, g Virginis, 29 Vir, HR 4825, HD 110379, SAO 138917
B 3,5 F0 g Virginis, 29 Vir, HR 4826, HD 110380, SAO 138917

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
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
33 Hipparcos Main Input Catalogue Version 2
Turon, C., et al., The Hipparcos Input Catalogue, Version 2, CDS Bull. No. 43, p.5, 1993
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: 12h 39min 7,452sec DEC: -1 10' 31,58'' 0,009 arcsec
position (J2000) RA: 12h 41min 39,598sec DEC: -1 26' 57,71''
proper motion J1950 (FK4) RA: -0,0379 arcsec/a DEC: 0,008 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0377 arcsec/a DEC: 0,012 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,9 (accuracy: 2 decimals)
source of visual magnitude data Combined magnitude of component stars.

spectral information:

spectral class F0
source of spectral data Taken from the HD with M stars reclassified by Miss Cannon.

remarks for duplicity and variability

Double star - see source catalog for source

catalogues

source catalogue FK3, catalogue number: 477
Durchmusterung BD-00 2601
Boss General Catalogue 17270
Henry Draper Catalogue 110379
The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

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

position and proper motion:

position (J2000) RA: 12h 41,7min DEC: -1 27'
proper motion (J2000) RA: -0,567 arcsec/a DEC: 0,008 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 '' 3,4 3,5 F0V F0V STF1670
AC 1889 1 159 53,1'' 3,6 15,1 - STF1670
AD 1912 3 88 123,6'' 3,6 12,2 - STF1670
1923 - 125,9''
AE 1851 6 186 255'' - - - STF1670
1909 180 251,8''
AF 1909 2 269 482,1'' - - - STF1670
BD 1880 1 88 102,8'' 3,7 12,3 - STF1670

discoverer information:

discoverer code discoverer reference
STF1670 Struve, F.G.W. -

notes:

note Gamma Vir. P = 169yr., a = 3.70", motion retrograde. One component is a suspected variable.

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

position:

position (J1900) RA: 12h 36,6min DEC: -0 54'

magnitudes, spectral classes, orbital elements:

author: K.A. Strand
date of observation: 1935
magnitude of component A: 3,48
magnitude of component B: 3,48
spectral class component B: F0V
spectral class component B: F0V
period [y]: 171,37
semi-major axis [arcsec]: 3,746
inclination [deg]: 146,05
node [deg]: 31,78
equinox of node: 1900
eccentricity: 0,881
time of periastron passage: 1836,433
dates of ephemeris: 1935-1956
grade: good
reference: Ann. Sterrew. Leiden 18, 77; 1937.
other name(s) STF 1670, Gamma Vir

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 12h 39min 7,5sec DEC: -1 10' 32''

variability informations:

magnitute at max. brightness 2,72
magnitute at min. brightness 2,78
photometric system visual, photovisual or Johnson's V

spectral information

spectral class F0

references

to a study 0132D (designation: 1670)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).