NGC 1220

(Collinder 37; MWSC 261; OCL 380)

0.87 UTI

0.62

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 74

Stellar density (N₅₀/rad) 32.3 [N/pc²]

C3 classification AB

C_N 0.62 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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NGC 1220 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.94 (50th percentile).

Rain et al. (2021)
This cluster was include in (Dias et al., 2002A&A...389..871D, Cat. B/ocl) however, parameters log(t)=7.957, Av=2.162, [Fe/H]=0.00 were taken from Bossini et al. (2019A&A...623A.108B, Cat. J/A+A/623/A108).

Data

🔍 Search references for NGC 1220 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–	47.921	53.345	0.327	0.193	-0.805	-39.756
Almeida et al.	2025	47.92	53.346	–	–	–	–
Hunt & Reffert	2024	47.923	53.35	0.351	0.187	-0.814	-58.92
Cavallo et al.	2024	47.922	53.346	0.341	–	–	–
Hunt & Reffert	2023	47.923	53.35	0.351	0.187	-0.814	-58.92
Almeida et al.	2023	47.92	53.346	–	–	–	–
Just et al.	2023	47.91	53.345	–	–	–	–
Jaehnig et al.	2021	47.919	53.347	0.342	0.202	-0.753	–
Rain et al.	2021	47.92	53.344	0.297	0.187	-0.717	–
Dias et al.	2021	47.92	53.346	0.305	0.181	-0.72	–
Cantat-Gaudin et al.	2020	47.92	53.344	0.297	0.187	-0.717	–
Zhong et al.	2020	47.92	53.344	–	0.187	-0.717	-53.838
Cantat-Gaudin & Anders	2020	47.92	53.344	0.297	0.187	-0.717	–
Bossini et al.	2019	47.92	53.344	–	–	–	–
Soubiran et al.	2018	47.92	53.344	–	–	–	-15.53
Bica et al.	2019	47.91	53.351	–	–	–	–
Cantat-Gaudin et al.	2018	47.92	53.344	0.297	0.187	-0.717	–
Loktin & Popova	2017	47.91	53.345	–	-0.173	3.251	–
Kharchenko et al.	2016	47.91	53.345	–	–	–	–
Dias et al.	2014	47.917	53.345	–	-0.13	-0.5	–
Kharchenko et al.	2013	47.922	53.347	–	0.3	0.4	–
Kharchenko et al.	2012	47.922	53.347	–	0.3	0.4	–
Bukowiecki et al.	2011	47.925	53.341	–	–	–	–
Ahumada & Lapasset	2007	47.925	53.35	–	–	–	–
van den Bergh	2006	47.925	53.333	–	–	–	–
Dias et al.	2002	47.917	53.345	–	-0.13	-0.5	–
Lynga	1987	47.93	53.332	–	–	–	–
Sulentic et al.	1973	47.908	53.344	–	–	–	–

💡 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–	2.91	2.37	1.56	85	0.000	303	0.54	0
Almeida et al.	2025	2.40	2.45	–	24	–	411	–	–
Hunt & Reffert	2024	–	–	–	–	–	900⁽¹⁾	–	–
Cavallo et al.	2024	2.95	2.47	–	85	0.370	–	–	–
Hunt & Reffert	2023	2.70	2.41	1.56	114	–	–	–	–
Almeida et al.	2023	2.49	2.48	–	36	-0.113	255⁽¹⁾	0.54	–
Just et al.	2023	–	–	–	158	–	85	–	–
Jaehnig et al.	2021	2.91⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	3.07	2.18	–	89	–	–	–	0
Dias et al.	2021	2.40	2.45	–	24	-0.140	–	–	–
Cantat-Gaudin et al.	2020	3.06	2.33	–	49	–	–	–	–
Kounkel et al.	2020	3.22	2.51	–	117	–	–	–	–
Zhong et al.	2020	3.07⁽¹⁾	2.37	–	8200	0.000	–	–	–
Cantat-Gaudin & Anders	2020	3.07	–	–	–	–	–	–	–
Bossini et al.	2019	3.19	2.16	–	91	0.000	–	–	–
Soubiran et al.	2018	3.07	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.07	–	–	–	–	–	–	–
Loktin & Popova	2017	3.17	2.10	–	73	–	–	–	–
Kharchenko et al.	2016	2.10	2.37	–	158	–	–	–	–
Kharchenko et al.	2013	2.10	2.37	–	158	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	303	–	–
Kharchenko et al.	2012	2.10	2.37	–	158	–	–	–	–
Bukowiecki et al.	2011	2.45⁽¹⁾	1.96	–	79	–	–	–	–
Ahumada & Lapasset	2007	–	2.21	–	60	–	–	–	0
van den Bergh	2006	1.80	2.21	–	60	–	–	–	–
Dias et al.	2002	1.80	2.21	–	60	–	–	–	–

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

Visualization

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