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Orion OB1

Orion OB1 (Ori OB1) is a contingent group of several dozen hot giant stars of spectral types O and B in Orion. Associated are thousands of lower-mass stars, and a (smaller but significant) number of protostars. It is part of the larger Orion molecular cloud complex. Owing to its relative closeness and complexity it is the most closely studied OB association.

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Age
~10 Myr
Constellation
Orion
Declination
−01° 12′
Mass
>8.0×103 M☉
Mean distance
1040–1630 ly (320–500 pc)
Right ascension
05h 36m

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Map overview Semantic statistics

Orion OB1

Nodes19
Edges18
Triples6
Avg. degree1.89
Density0.105263
Components1

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Orion OB1

Top relations

Age · 1
Orion OB1 → ~10 Myr
Constellation · 1
Orion OB1 → Orion
Declination · 1
Orion OB1 → −01° 12′
Mass · 1
Orion OB1 → 8.0×103 M☉
Mean distance · 1
Orion OB1 → 1040–1630 ly (320–500 pc)
Right ascension · 1
Orion OB1 → 05h 36m

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Important terminology

orion stars group subgroups million years age belt orion's ob1 ori average known orionis three association 12 stellar see also

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Orion OB1Age~10 Myr1.00infobox
Orion OB1ConstellationOrion1.00infobox
Orion OB1Declination−01° 12′1.00infobox
Orion OB1Mass>8.0×103 M☉1.00infobox
Orion OB1Mean distance1040–1630 ly (320–500 pc)1.00infobox
Orion OB1Right ascension05h 36m1.00infobox

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    Min side: 3
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