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AS 209

AS 209 is a young pre-main-sequence K-type star located in the Ophiuchus star formation region about 126 parsecs from the Sun. It has a mass of 0.9 solar masses and a luminosity of 1.5 solar luminosity. It is only somewhere between 0.5-1.0 million years old. Surrounding AS 209 is a remarkable protoplanetary disk. This disk is separated into several…

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Apparent magnitude (V)
11.28
Constellation
Ophiuchus
Declination
–14° 22′ 08.64″
Evolutionary stage
pre-main sequence
Right ascension
16h 49m 15.303s
Spectral type
K4Ve

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Map overview Semantic statistics

AS 209

Nodes19
Edges18
Triples9
Avg. degree1.89
Density0.105263
Components1

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AS 209

Top relations

is a · 2
AS 209 → remarkable protoplanetary disk, young pre-main-sequence K-type star located in the Ophiuchus star formation region about 126 parsecs from the Sun
Apparent magnitude (V) · 1
AS 209 → 11.28
Constellation · 1
AS 209 → Ophiuchus
Declination · 1
AS 209 → –14° 22′ 08.64″
Evolutionary stage · 1
AS 209 → pre-main sequence
Right ascension · 1
AS 209 → 16h 49m 15.303s
Spectral type · 1
AS 209 → K4Ve
Variable type · 1
AS 209 → T Tauri

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Important terminology

star disk 209 gap variable outer mass rings protoplanetary young masses million old au found periodic variability shows orbiting first

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
AS 209Apparent magnitude (V)11.281.00infobox
AS 209ConstellationOphiuchus1.00infobox
AS 209Declination–14° 22′ 08.64″1.00infobox
AS 209Evolutionary stagepre-main sequence1.00infobox
AS 209Right ascension16h 49m 15.303s1.00infobox
AS 209Spectral typeK4Ve1.00infobox
AS 209Variable typeT Tauri1.00infobox
AS 209is ayoung pre-main-sequence K-type star located in the Ophiuchus star formation region about 126 parsecs from the Sun0.90text
AS 209is aremarkable protoplanetary disk0.90text

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