Menu

Psi Ursae Majoris — Star in Ursa Major

Magnitude 3.0m Star Ursa Major (UMa) Visible
Star Map
+ List + Plan

About Psi UMa

Description

Psi Ursae Majoris is an orange giant of spectral type K1III at magnitude 3.01 in Ursa Major. It has a surface temperature of about 4,600 K and a warm orange hue. It lies in the body of the Great Bear, south of the more prominent Big Dipper asterism.

Observing Tips

Psi UMa is located in the hindquarter of the Great Bear, south of the Dipper's bowl stars. It is visible year-round from mid-northern latitudes as part of the circumpolar constellation Ursa Major. Its orange color is apparent in binoculars. Best placed in the evening sky from February through July.

History

Psi Ursae Majoris has no traditional proper name. It lies in the body of the Bear, part of the extended figure that is much larger than the familiar Big Dipper asterism. Ursa Major is one of the oldest recognized constellations, known to cultures around the world under various guises — a bear, a plough, a wagon, or a ladle.

Fun Facts

Many people are surprised to learn that Ursa Major extends far beyond the Big Dipper — the Dipper forms only the Bear's back and tail, while many additional stars outline its head, legs, and feet. Psi UMa is one of these 'body' stars that most casual observers never notice.

Observe

1Physical Properties

Magnitude 3.01
Spectral Type K1III giant
Star Color Orange (B-V 1.14)
Distance 144 ly

2Position & Identifiers

RA 11h 09m 39.8s
Dec +44° 29' 55.0"
Constellation Ursa Major (UMa)
HR 4335
HIP 54539
HD 96833
SAO 43629
Bayer Psi
Flamsteed 52 UMa

3How easy to spot?

Sign in and configure your equipment and default location to see a personalized row.
Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Easy Easy Easy
50mm finder Easy Easy Easy
150mm scope Easy Easy Easy
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

Set a location in User Settings to see visibility data.

Best season Feb – Apr (peak: Mar)

5Survey Image

Loading survey image…

Explore

7

Size Comparison

Querying VizieR for stellar data…
8

Compare Stars

9

Spectral Classification

10

Hertzsprung-Russell Diagram

Loading HR diagram…
11

Stellar Lifecycle

12

Blackbody Spectrum

13

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

14

Stellar Fusion

Discover

15

Light Travel Time Machine

16

Relativistic Travel

}