T Mon
Observable Variable Star
Excellent (64/100)
Range: 5.6 - 6.6, Period: 27.0d, Type: DCEP
HIP 30541
VariableStar
Mon
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
5.98
Range
5.6 - 6.6
Period
27.025 days
Variable Type
Classical Cepheid
Spectral Type
F7Iab-K1Iab
Star Color
Red
(B-V 1.22)
Distance
652.3 ly
Position & Identifiers
RA
06h 25m 13.1s
Dec
+07° 05' 09.0"
Constellation
Mon
HR
2310
HIP
30541
Variable ID
T Mon
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Visibility
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Light Curve
Comparison Stars for T Mon (5.6–6.6)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
6.5″
Companion Mag
17.7
Position Angle
276°
Star Colors
A: Red
Discoverer
EVS 11
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 6.5″ · PA: 276° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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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
CDelta 5.58 - 6.62V, 27.0205d since 1933. Period has increased from 27.0093 before 1900, with mean value 27.024649d.
IUE observations suggest an early-type companion, about A0.
Survey Image
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