Nor OB5

0.62 UTI

0.84

C_N

1.0

C_dens

0.75

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 339

Stellar density (N₅₀/rad) 44.0 [N/pc²]

C3 classification AB

C_N 0.84 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Nor OB5 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as an extremely massive, very young cluster (see Parameters). It is poorly studied in the literature, with no articles listed in the last 18 years.

Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Moderate extinction Extremely massive Very young

Data

🔍 Search references for Nor OB5 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	242.603	-49.046	0.534	-2.042	-2.151	-23.718
Piskunov et al.	2008	242.629	-49.041	–	–	–	–
Kharchenko et al.	2007	242.41	-48.94	–	1.0	–	-23.14
Piskunov et al.	2007	242.629	-49.041	–	–	–	–
Kharchenko et al.	2005	242.64	-49.04	–	-2.27	-2.26	-23.14

💡 Note: The UCC values are estimated from its identified members.

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	B_frac	BSS
UCC	99999–	1.8	2.67	–	13	–	348645	–	–
Piskunov et al.	2008	1.80	2.67	–	13	–	599791⁽¹⁾	–	–
Piskunov et al.	2007	1.80	2.67	–	13	–	97499	–	–
Kharchenko et al.	2005	1.80	2.67	–	13	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
FSR 1722	88.5	242.6	-49.04	0.53	-2.04	-2.15	-23.72	0.02
DBSB 101	54.0	242.61	-49.04	0.54	-1.92	-2.15	-22.9	0.0

💡 Note: The % column shows the percentage of members that Nor OB5 shares with each listed object.

Visualization

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