SAI 109

(MWSC 1705)

0.63 UTI

0.79

C_N

0.4

C_dens

0.75

C_C3

0.61

C_lit

1.0

C_dup

N_m (P>50%) 201

Core radius and density 3.2 [pc], 2.0 [pc^-2]

C3 classification AB

C_N 0.79 Rich
C_dens 0.4 Loose
C_C3 0.75 High quality
C_lit 0.61 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

SAI 109 is a rich, loose object of high C3 quality. Its parallax locates it at a large distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster (see Parameters). It is moderately studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Very distant Moderate extinction Massive Near-solar metallicity Old Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.85 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.85 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1515, e_all=0.0477.

Data

🔍 Search references for SAI 109 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	145.913	-50.797	0.126	-4.436	3.725	82.417
Hu & Soubiran	2025	145.903	-50.803	–	–	–	–
Almeida et al.	2025	145.893	-50.802	–	–	–	–
Hunt & Reffert	2024	145.922	-50.795	0.135	-4.424	3.685	80.402
Cavallo et al.	2024	145.903	-50.803	0.133	–	–	–
Hunt & Reffert	2023	145.922	-50.795	0.135	-4.424	3.685	80.402
Just et al.	2023	145.9	-50.78	–	–	–	–
Jadhav & Subramaniam	2021	145.902	-50.797	–	–	–	–
Dias et al.	2021	145.893	-50.802	0.07	-4.43	3.778	–
Cantat-Gaudin et al.	2020	145.902	-50.797	0.095	-4.378	3.825	–
Cantat-Gaudin & Anders	2020	145.902	-50.797	0.095	-4.378	3.825	–
Soubiran et al.	2018	145.902	-50.797	–	–	–	82.33
Bica et al.	2019	145.892	-50.797	–	–	–	–
Cantat-Gaudin et al.	2018	145.902	-50.797	0.095	-4.378	3.825	–
Dias et al.	2018	–	–	–	-4.94	3.19	–
Sampedro et al.	2017	145.892	-50.792	–	-6.1	3.5	–
Kharchenko et al.	2016	145.9	-50.78	–	–	–	–
Dias et al.	2014	145.892	-50.792	–	-6.79	3.33	–
Kharchenko et al.	2013	145.905	-50.783	–	-6.5	7.12	–
Glushkova et al.	2010	145.893	-50.792	–	–	–	–
Dias et al.	2002	145.892	-50.792	–	-6.79	3.33	–

💡 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–	7.14	2.005	1.94	1000	-0.173	1678	–	5
Hu & Soubiran	2025	–	–	–	–	-0.210⁽⁵⁾	–	–	–
Almeida et al.	2025	7.55	2.28	–	918	–	1490	–	–
Hunt & Reffert	2024	6.57	2.29	1.94	768	–	1866⁽¹⁾	–	–
Cavallo et al.	2024	5.97	2.04	–	955	-0.050	–	–	–
Hunt & Reffert	2023	6.57	2.29	1.94	767	–	–	–	–
Just et al.	2023	–	–	–	1000	–	885	–	–
Jadhav & Subramaniam	2021	7.14	1.78	–	1047	–	2158	–	5⁽¹⁾
Dias et al.	2021	7.55	2.28	–	918	-0.173	–	–	–
Cantat-Gaudin et al.	2020	7.14	1.78	–	1047	–	–	–	–
Kounkel et al.	2020	4.85	2.06	–	813	–	–	–	–
Cantat-Gaudin & Anders	2020	8.07	–	–	–	–	–	–	–
Soubiran et al.	2018	8.07	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	8.07	–	–	–	–	–	–	–
Kharchenko et al.	2016	5.25	1.97	–	1000	–	–	–	–
Kharchenko et al.	2013	5.25	1.97	–	1000	–	–	–	–
Glushkova et al.	2010	7.69	0.73	–	1585	–	–	–	–
Dias et al.	2002	7.69	0.73	–	1585	–	–	–	–

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

Visualization

ℹ️

1 2 3