Nair al Saif
HIP 26241; Iota Ori; 44 Ori
Observable Double Star
Good (58/100)
Sep: 11.2", Companion: mag 7.7
HIP 26241; Iota Ori; 44 Ori
DoubleStar
Ori
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
2.77
Spectral Type
O9.5III
Star Color
Blue
(B-V -0.24)
Distance
1438.8 ly
Position & Identifiers
RA
05h 35m 26.0s
Dec
-05° 54' 36.0"
Constellation
Ori
HR
1899
HIP
26241
Bayer
Iota
Flamsteed
44 Ori
Double Cat
4193
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
11.2″
Companion Mag
7.7
Companion Sp
B2V
Position Angle
141°
Star Colors
A: Blue
B: Blue
Discoverer
STF 752
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 11.2″ · PA: 141° · 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
Component B is NSV 2334, 7.4V.
AB fixed. B is B7IV; vsini 50k/s.
ADS 4193A, 29.1351d, K 115.2k/s, V0 +26.6k/s, msin3i 15.7, asini 30.0.
Color excess E(B-V) = +0.07.
Iota Ori cluster; Ori OB1c4; sword of Orion; HII region.
Enhanced ultraviolet emission. Helium weak. Interstellar Lyman alpha absorption observed by AEROBEE rocket. | Iota Ori B is a helium weak star. Helium deficient by factor of 10 relative to standard stars. P and Ga enormously | enhanced. uv 1240 absorption strong; weak 1548.
0.005".
ADS 4193A, mass ejection vel. up to 1600k/s. ADS 4193B, +16k/s.
Nair al Saif; Hatysa in Becvar.
Survey Image
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