Graham 1

0.45 UTI

0.0

C_N

0.52

C_dens

0.75

C_C3

0.48

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 1.2 [pc], 2.6 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.52 Moderately dense
C_C3 0.75 High quality
C_lit 0.48 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Graham 1 is a sparse, moderately 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, very young cluster (see Parameters). It is poorly studied in the literature.

Distant Moderate extinction Near-solar metallicity Very young

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

Hu et al. (2021)
Ellipticities (core, all): e_core=0.4095, e_all=0.1757.

Data

🔍 Search references for Graham 1 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–	164.134	-63.008	0.265	-6.261	2.178	47.507
Almeida et al.	2025	164.148	-63.017	–	–	–	–
Celli et al.	2024	164.134	-63.018	–	–	–	–
Dias et al.	2021	164.148	-63.017	0.222	-6.338	2.148	–
Cantat-Gaudin et al.	2020	164.134	-63.018	0.218	-6.324	2.178	–
Sánchez et al.	2020	164.133	-63.018	–	-6.536	2.048	–
Cantat-Gaudin & Anders	2020	164.134	-63.018	0.218	-6.324	2.178	–
Monteiro & Dias	2019	164.134	-63.018	–	-6.303	2.164	2.598
Soubiran et al.	2018	164.134	-63.018	–	–	–	3.88
Cantat-Gaudin et al.	2018	164.134	-63.018	0.218	-6.324	2.178	–
Dias et al.	2018	–	–	–	-6.93	1.65	–
Sampedro et al.	2017	164.133	-63.018	–	-4.68	1.18	–
Dias et al.	2014	164.133	-63.018	–	-3.17	1.91	–
Bukowiecki et al.	2011	164.137	-22.696	–	–	–	–
Dias et al.	2002	164.133	-63.018	–	-6.99	4.89	–
Lynga	1987	164.042	-63.015	–	–	–	–

💡 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–	3.65	2.21	–	15	0.018	153	–	–
Almeida et al.	2025	3.65	2.21	–	6	–	153	–	–
Celli et al.	2024	–	–	–	16	–	262	–	–
Dias et al.	2021	3.65	2.21	–	6	-0.003	–	–	–
Cantat-Gaudin et al.	2020	3.56	2.29	–	15	–	–	–	–
Kounkel et al.	2020	3.31	2.26	–	47	–	–	–	–
Cantat-Gaudin & Anders	2020	4.06	–	–	–	–	–	–	–
Monteiro & Dias	2019	4.94	2.16	–	8	0.039	–	–	–
Soubiran et al.	2018	4.06	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	4.06	–	–	–	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	139	–	–
Bukowiecki et al.	2011	3.04⁽¹⁾	1.55	–	32	–	–	–	–
Dias et al.	2002	3.60	–	–	–	–	–	–	–

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

Visualization

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