Xi (ξ) Ursa Majoris

Solar Type Star


Right Ascension	00h 00m 00s	Best Seen	---
Declination	00° 00' 00"	Magnitude	-.--
		Constellation	Ursa Major


	Actual	Compared to Sun
Distance	~-- ly	--
Actual Brightness	--	--
Surface Temperature	-- °K	--
Diameter	--	--
Mass	--	--
Surface Gravity	--	--
Surface Composition (by mass)	74% hydrogen 24% helium 2% everything else	same
Spectral Type	---	G2 V
Density (gram/cubic cm)	--	--

What To Look For Through The Telescope

TODO:

XI (ξ) URSAE MAJORIS
SOLAR TYPE STAR

Right Ascension:
11h 18m 11s

Best Seen:
2/15 - 7/15

Declination:
31º 31' 47"

Magnitude:
3.79

Computer File:
xiuma

Constellation:
Ursa Major

Actual

Compared to Sun

Distance

~ 11.4 ly

--

Actual Brightness

--

Surface Temperature

~ 6000 K

~ 1.03

Diameter

--

Mass

--

Surface Gravity

--

Surface Composition (by mass)

74% hydrogen 24% helium 2% everything else

same

Spectral Type

G0 V

G2 V

Density (gram/cubic cm)

--

WHAT TO LOOK FOR THROUGH THE TELESCOPE:

Recommended eyepiece: 24mm or 40 mm.
When people look through the telescope they should see a faint star. It may appear to be a pale yellow.

XI URSA MAJOR INFORMATION:

Xi Ursa Major is a multiple star system. It’s also the first multiple star system to have its orbit calculated (in 1828).

For Greg: So little info for this star!? Should we talk about it?

ALSO: Old pages gave Distance: 26 ly Binary info avg separation: 20 million miles period: 60 years magnitude: 4.3 / 48 each of the binary components is itself a binary star

BUT can find no info to support this.

Item
Updated Notes

Coordinates 11-26-2003
SIMBAD 11 18 11 + 31 31 44 Hipparcos 11 18 11 + 31 31 50

Magnitude
11-26-2003
SIMBAD 3.78 Hipparcos 3.79

Distance
11-26-2003
SIMBAD parallax n/a Hippparcos parallax n/a

Actual Brightness

Surface Temperature

Diameter

Mass

Surface Gravity

Surface Composition 11-26-2003
OK for all stars

Spectral Type
11-26-2003
SIMABD, Hipparcos G0V

Density

Other Information
11-26-2003
http://www.dibonsmith.com/uma_xi.htm