U Ori
Observable Variable Star
Excellent (65/100)
Range: 4.8 - 12.6, Period: 368.3d
HR 2063
VariableStar
Ori
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
5.40
Spectral Type
M6.5IIIe
Star Color
Orange
(B-V 0.99)
Position & Identifiers
RA
05h 55m 49.3s
Dec
+20° 10' 30.0"
Constellation
Ori
HR
2063
Variable ID
U Ori
Visibility
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Comparison Stars for U Ori (4.8–12.6)
Nearby stable stars for estimating brightness (AAVSO)
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
M 4.8 - 12.6v, 368.3d. Period has varied between 367.9 and 376.0d. Colors correspond to 6.72V.
Infrared star. OH and water emission. SiO maser source. OH emission strong in infrared. Also H2O microwave | emission. IR spectra show water vapor. Strong water bands at light minimum.
Occultation diam. = 0.0143 - 0.01545".
Survey Image
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