NGC 1027

(MWSC 225; FoF 2187)

0.95 UTI

1.0

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 634

Stellar density (N₅₀/rad) 45.8 [N/pc²]

C3 classification AB

C_N 1.0 Very rich
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 1027 is a very 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 a near-solar metallicity, intermediate-age 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 Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for NGC 1027 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–	40.676	61.617	0.883	-1.786	2.032	-45.071
Li et al.	2025	40.677	61.616	0.882	-1.753	2.09	–
Wei et al.	2025	40.624	61.612	0.881	-1.756	1.973	–
Almeida et al.	2025	40.658	61.608	–	–	–	–
Hunt & Reffert	2024	40.652	61.623	0.888	-1.789	2.04	-43.832
Cavallo et al.	2024	40.675	61.616	0.887	–	–	–
Hunt & Reffert	2023	40.652	61.623	0.888	-1.789	2.04	-43.832
Almeida et al.	2023	40.682	61.626	–	–	–	–
Just et al.	2023	40.652	61.618	–	–	–	–
He et al.	2022	40.657	61.615	0.889	-1.782	2.032	–
Tarricq et al.	2022	40.738	61.624	0.904	-1.79	2.034	–
Jaehnig et al.	2021	40.709	61.612	0.919	-1.748	2.112	–
Rain et al.	2021	40.677	61.616	0.882	-1.753	2.09	–
Dias et al.	2021	40.658	61.608	0.877	-1.752	2.116	-30.862
Cantat-Gaudin et al.	2020	40.677	61.616	0.882	-1.753	2.09	–
Cantat-Gaudin & Anders	2020	40.677	61.616	0.882	-1.753	2.09	–
Liu & Pang	2019	40.654	61.613	0.887	-1.735	2.111	–
Soubiran et al.	2018	40.677	61.616	–	–	–	-4.06
Cantat-Gaudin et al.	2018	40.677	61.616	0.882	-1.753	2.09	–
Loktin & Popova	2017	40.68	61.634	–	-1.922	-1.944	15.0
Kharchenko et al.	2016	40.652	61.618	–	–	–	–
Dias et al.	2014	40.679	61.634	–	-2.46	0.95	–
Kharchenko et al.	2013	40.665	61.62	–	-2.22	-0.83	15.0
Gozha et al.	2012	40.679	61.634	–	–	–	–
Kharchenko et al.	2012	40.665	61.62	–	-2.22	-0.83	15.0
Piskunov et al.	2008	40.654	61.626	–	–	–	–
Kharchenko et al.	2007	40.66	61.6	–	0.24	–	15.0
Piskunov et al.	2007	40.654	61.626	–	–	–	–
van den Bergh	2006	40.65	61.633	–	–	–	–
Kharchenko et al.	2005	40.66	61.63	–	-2.42	1.41	15.0
Kharchenko et al.	2003	40.69	61.62	–	0.48	3.85	–
Chen et al.	2003	40.725	61.555	–	0.76	0.35	15.0
Dias et al.	2002	40.679	61.634	–	-2.46	0.95	15.63

💡 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–	1.04	1.195	0.85	209	0.053	494	0.42	0.0
Li et al.	2025	1.13	1.15	–	235	0.253	–	–	–
Wei et al.	2025	1.93	1.79	–	204	-0.250	1405	0.41	–
Almeida et al.	2025	1.04	1.40	–	90	–	1341	–	–
Hunt & Reffert	2024	–	–	–	–	–	1491⁽¹⁾	–	–
Cavallo et al.	2024	1.13	1.46	–	126	0.070	–	–	–
Hunt & Reffert	2023	1.07	1.24	0.85	114	–	–	–	–
Almeida et al.	2023	1.07	1.49	–	127	-0.038	879⁽¹⁾	0.43	–
Just et al.	2023	–	–	–	355	–	54	–	–
He et al.	2022	–	1.50	–	56	–	–	–	–
Tarricq et al.	2022	1.10	–	–	214	–	–	–	–
Jaehnig et al.	2021	1.09⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.10	1.27	–	251	–	–	–	0
Dias et al.	2021	1.04	1.40	–	90	0.036	–	–	–
Cantat-Gaudin et al.	2020	1.13	1.01	–	195	–	–	–	–
Cantat-Gaudin & Anders	2020	1.10	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	65	0.500	–	–	–
Soubiran et al.	2018	1.10	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.10	–	–	–	–	–	–	–
Loktin & Popova	2017	0.80	1.00	–	158	–	–	–	–
Kharchenko et al.	2016	0.95	0.78	–	355	–	–	–	–
Kharchenko et al.	2013	0.95	0.78	–	355	–	–	–	–
Gozha et al.	2012	1.03	–	–	251	–	110	–	–
Kharchenko et al.	2012	0.95	0.78	–	355	–	–	–	–
Piskunov et al.	2008	0.77	1.02	–	355	–	103⁽¹⁾	–	–
Piskunov et al.	2007	0.77	1.02	–	355	–	36	–	–
van den Bergh	2006	0.77	0.99	–	158	–	–	–	–
Kharchenko et al.	2005	0.77	1.02	–	355	–	–	–	–
Kharchenko et al.	2003	1.00	1.24	–	–	–	–	–	–
Chen et al.	2003	0.77	–	–	150	–	–	–	–
Dias et al.	2002	1.03	1.27	–	251	–	–	–	–

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

Visualization

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