IRAS 20306+4005

(MWSC 3361)

0.67 UTI

0.64

C_N

1.0

C_dens

1.0

C_C3

0.35

C_lit

1.0

C_dup

N₅₀ (P>50% members) 79

Stellar density (N₅₀/rad) 52.8 [N/pc²]

C3 classification AA

C_N 0.64 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.35 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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IRAS 20306+4005 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a close^* distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~0.98 kpc) differs significantly from the median photometric distance (~1.65 kpc).

Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.

Relatively close High extinction Near-solar metallicity Very young

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P296, along with CWNU_1243.

Cavallo et al. (2024)
Wood sample.

Data

🔍 Search references for IRAS 20306+4005 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–	308.049	40.292	1.023	-1.791	-4.003	–
Hunt & Reffert	2024	308.059	40.292	1.009	-1.811	-3.997	4.021
Cavallo et al.	2024	308.061	40.297	1.026	–	–	–
Hunt & Reffert	2023	308.059	40.292	1.009	-1.811	-3.997	4.021
Just et al.	2023	308.11	40.282	–	–	–	–
Kharchenko et al.	2016	308.11	40.282	–	–	–	–
Kharchenko et al.	2013	308.115	40.285	–	0.16	0.02	-9.8

💡 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–	1.645	4.11	2.51	3	-0.050	270	–	–
Hunt & Reffert	2024	–	–	–	–	–	300⁽¹⁾	–	–
Cavallo et al.	2024	1.27	2.86	–	5	-0.050	–	–	–
Hunt & Reffert	2023	0.93	3.70	2.51	5	–	–	–	–
Just et al.	2023	–	–	–	3	–	240	–	–
Kharchenko et al.	2016	2.02	4.52	–	3	–	–	–	–
Kharchenko et al.	2013	2.02	4.52	–	3	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 1011	54.4	308.05	40.29	1.03	-1.66	-4.07	–	0.05

💡 Note: The % column shows the percentage of members that IRAS 20306+4005 shares with each listed object.

Visualization

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