Beta Delphini

__NOTOC__Starbox 2
name = β Delphini
epoch = J2000.0
equinox = J2000.0 (ICRS)
constell = Delphinus
component_a = A
component_b = B
ra_a_h = 20
ra_a_m = 37
ra_a_s = 32.944
dec_a_d = +14
dec_a_m = 35
dec_a_s = 42.33
radec_a_footnote = [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/239/h_dm_com&recno=21195 HIP 101769, record for component 1] , Hipparcos catalogue; CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?I/239 I/239] .]
ra_b_h = 20
ra_b_m = 37
ra_b_s = 32.934
dec_b_d = +14
dec_b_m = 35
dec_b_s = 42.28
radec_b_footnote = [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/239/h_dm_com&recno=21196 HIP 101769, record for component 2] , Hipparcos catalogue; CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?I/239 I/239] .]
appmag_v_system= 3.632SIMBAD link|beta+del|HD 196524 -- Spectroscopic binary, database entry, SIMBAD. Accessed on line October 1, 2008.]
appmag_v_a=4.11
appmag_v_b=5.02
class_a = F5IV
class_b = F2V
u-b_system = +0.08 [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=7882 HR 7882] , database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?V/50 V/50] . Accessed on line October 1, 2008.]
b-v_system = +0.44
r-i_system = +0.24
radial_v_system = −24.1 ± 0.9 [This value is for the barycenter of the binary system.] [Table 3, Multiplicity among solar-type stars, H. A. Abt and S. G. Levy, "Astrophysical Journal Supplement Series" 30 (March 1976), pp. 273–306, bibcode|1976ApJS...30..273A.]
prop_mo_ra_a = 119.81
prop_mo_dec_a = −53.57
prop_mo_ra_b = 114.75
prop_mo_dec_b = −33.97
parallax = 33.49
p_error = 0.88
parallax_footnote =
absmag_v_system=1.26 [From apparent magnitude and parallax.]
mass_a=2.2
mass_b=1.8
luminosity_a=18
luminosity_b=8 [http://www.astro.uiuc.edu/~kaler/sow/rotanev.html Rotanev] , "Stars", Jim Kaler. Accessed on line October 1, 2008.]
orbit_footnote= [Entry 20375+1436, [http://ad.usno.navy.mil/wds/orb6/orb6orbits.txt Sixth Catalog of Orbits of Visual Binary Stars] , United States Naval Observatory. Accessed on line October 1, 2008.]
period_unitless=26.65 y
axis_unitless=0.443″
periastron=B1962.87
inclination=62.1
node=177.9
eccentricity=0.355
periarg=348.8
names=Rotanev, Rotanen, Venator, β Del, Beta Delphini, Beta Del, 6 Delphini, 6 Del, BU 151AB, 1RXS J203732.7+143537, 2E 2035.2+1425, 2E 4395, 2MASS J20373291+1435421, ADS 14073 AB, BD+14 4369, CCDM J20375+1436AB, CSI+14° 4369 1, GC 28709, GCRV 12902, GSC 01100-01720, HD 196524, HIP 101769, HR 7882, IDS 20328+1415, IRC +10473, JP11 3257, N30 4554, PLX 4906, ROT 3004, SAO 106316, SBC7 821, TD1 27036, TYC 1100-1720-1,
UBV 17888, UBV M 25011, WDS 20375+1436AB, YZ 14 8041.
simbad_system=beta+del

Beta Delphini (Beta Del / β Delphini / β Del) is a multiple star in the constellation of Delphinus. As a practical joke, the astronomer Niccolò Cacciatore gave it the name Rotanev, which is a reversal of his Latinized family name, "Venator". The star has five components; components A and B are a physical binary; the others are optical.

Visual companions

The binary star β Delphini has three visual companions, designated as WDS 20375+1436C, D, and E.

Componentbox begin
designation=WDS 20375+1436
footnote=Entry 20375+1436, [http://ad.usno.navy.mil/wds/wdsnewframe4.html The Washington Double Star Catalog] , United States Naval Observatory. Accessed on line October 1, 2008.]
expanded = yesComponentbox component
letter = C
primary = AB
appmag_v = 13.1
epoch = 1961
posang= 126
angdist= 18.7
ra = RA|20|37|33.4
dec = DEC|+14|35|29
radec_footnote = SIMBAD link|CCDM+J20375%2B1436C|BD+14 4369C -- Star in double system, database entry, SIMBAD. Accessed on line October 1, 2008.]
simbad = CCDM+J20375%2B1436C
expanded = yesComponentbox component
letter = D
primary = AB
appmag_v = 11.0
epoch = 1999
posang= 319
angdist= 46.0
ra = RA|20|37|30.6
radec_footnote = SIMBAD link|CCDM+J20375%2B1436D|BD+14 4369D -- Star in double system, database entry, SIMBAD. Accessed on line October 1, 2008.]
dec = DEC|+14|36|13
simbad = CCDM+J20375%2B1436D
expanded = yesComponentbox component
letter = E
primary = AB
appmag_v = 11.63
epoch = 1991
posang= 271
angdist= 109.6
ra = RA|20|37|24.7
radec_footnote = SIMBAD link|CCDM+J20375%2B1436E|BD+14 4369E -- Star in double system, database entry, SIMBAD. Accessed on line October 1, 2008.]
dec = DEC|+14|35|42
simbad = CCDM+J20375%2B1436E
expanded = yes

References

ee also

* Sualocin and Rotanev

External links

* http://jumk.de/astronomie/special-stars/rotanev.shtml