3D shape of Orion A from Gaia DR2 | Astronomy & Astrophysics (A&A)

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Table 1.

Distances to sub-regions in Orion A from the literature.

Reference	Method	Region	Distance
			(pc)
Genzel et al. (1981)	Proper motion and radial velocity	Orion KL	480 ± 80
	of H₂O masers
Hirota et al. (2007)	VERA/VLBI	Orion KL	437 ± 19
Menten et al. (2007)	VLBI	ONC	414 ± 7
Sandstrom et al. (2007)	VLBI	ONC
Kim et al. (2008)	VERA/VLBI	Orion KL	418 ± 6
Lombardi et al. (2011)	Density of foreground stars	Orion A	371 ± 10

Schlafly et al. (2014) ^a	PanSTARRS optical reddening	(l/b) at (208.4°,−19.6°) north of the ONC
	(Green et al. 2014)	(l/b) at (209.1°,−19.9°) west of the ONC
		(l/b) at (209.0°,−20.1°) west of the ONC
		(l/b) at (209.8°,−19.5°) north to L1641-North
		(l/b) at (212.2°,−18.6°) east to L1641-South
		(l/b) at (212.4°,−19.9°) west to L1641-South
		(l/b) at (214.7°,−19.0°) south-east of L1647-South

Kounkel et al. (2017)^a	VLBI	15 YSOs near the ONC	388 ± 5
		2 YSOs near L1641-South	428 ± 10

Kounkel et al. (2018)	Gaia DR2 of APOGEE-2 sources	ONC	386 ± 3
	+ HR-diagram selection	L1641-South	417 ± 4
		L1647	443 ± 5

Kuhn et al. (2018)	Gaia DR2 of Chandra X-ray sources	ONC
		North and south to ONC	∼395

Notes.

^(a)