Pi1 Ursae Majoris

Starbox begin
name=π¹ Ursae Majoris Starbox observe
epoch=J2000
ra=08^h 39^m 11.7^s
dec=+65° 01′ 15″
appmag_v=5.63
constell=Ursa Major Starbox character
class=G1.5Vb
b-v=0.62
u-b=0.07
variable=BY Draconis Starbox astrometry
radial_v=-12.5
prop_mo_ra=-27.73
prop_mo_dec=87.90
parallax=70.07
p_error=0.71
absmag_v=4.86 Starbox detail
mass=1.08
radius=?
luminosity=0.89
temperature=5,860
metal=?
rotation=4.79 days
age=? Starbox catalog
names=3 Ursae Majoris, Gl 311, HR 3391, BD +65°643, HD 72905, GCTP 2047.10, SAO 14609, GC 11817, HIP 42438.

pi¹ Ursae Majoris is a yellow G-type main sequence dwarf with a mean apparent magnitude of +5.63. It is approximately 46.5 light years from Earth. It is classified as a BY Draconis type variable star and its brightness varies by 0.08 magnitudes. An excess of infrared radiation has been detected from this system, which is indicative of a debris disk. [cite journal
last=Beichman | first=C. A.
coauthors=Tanner, A.; Bryden, G.; Stapelfeldt, K. R.; Werner, M. W.; Rieke, G. H.; Trilling, D. E.; Lawler, S.; Gautier, T. N.
title=IRS Spectra of Solar-Type Stars: A Search for Asteroid Belt Analogs
journal=The Astrophysical Journal
year=2006 | volume=639 | pages=1166–1176
doi=10.1086/499424 ]

References

External links

* [http://www.alcyone.de/SIT/bsc/HR3391.html Alcyone emphemeris]
* [http://sco.stsci.edu/starvault/detail.php?starchoice=42438 TPF-C data for Hip 42438]
* [http://aanda.u-strasbg.fr:2002/papers/aa/full/2001/45/aa1718/node6.html#SECTION000610000000000000000 Individual results for HD 72905]