Tabit
HIP 22449; Pi Ori; 1 Ori
HIP 22449; Pi Ori; 1 Ori
DoubleStar
Ori
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.19
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F6IV-V
Star Color
Yellow
(B-V 0.45)
Distance
26.1 ly
Position & Identifiers
RA
04h 49m 50.4s
Dec
+06° 57' 41.0"
Constellation
Ori
HR
1543
HIP
22449
Bayer
Pi
Flamsteed
1 Ori
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Visibility
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Multiple Star System
Separation
72.7″
Companion Mag
11.3
Position Angle
174°
Star Colors
A: Yellow
Discoverer
STT 560
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 72.7″ · PA: 174° · 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
Delta Sct? Amp. 0.05V.
Visual companion probably optical.
Designated Tabit by Becvar but Allen gives Thabit as Burritt's name for an unlettered star on his atlas, the Upsilon | of Heis (HR 1855). The superscripts for Pi Ori adopted in the Harvard catalogues and taken over in the BS | correspond to the Heis atlas and Argelander's identifications of Flamsteed numbers. Very many old catalogues follow the | BAC. Heis superscripts 1,2,3,4 are respectively 4,2,1,3 in the BAC.
Survey Image
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