SAI 24

(MWSC 249)

0.91 UTI

0.8

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 224

Stellar density (N₅₀/rad) 25.2 [N/pc²]

C3 classification AB

C_N 0.8 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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SAI 24 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a significant percentage of members with 5 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 265 along with IC_1848.

Palma et al. (2025)
Part of multiple system G225, along with OC_0255 and IC_1848.

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for SAI 24 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–	44.826	60.571	0.448	-0.226	0.074	-49.279
Almeida et al.	2025	44.783	60.561	–	–	–	–
Hunt & Reffert	2024	44.87	60.565	0.442	-0.239	0.052	-48.46
Celli et al.	2024	44.816	60.566	–	–	–	–
Cavallo et al.	2024	44.772	60.572	0.448	–	–	–
Hunt & Reffert	2023	44.87	60.565	0.442	-0.239	0.052	-48.46
Almeida et al.	2023	44.792	60.56	–	–	–	–
Just et al.	2023	44.852	60.548	–	–	–	–
Dias et al.	2021	44.783	60.561	0.444	-0.225	0.106	–
Cantat-Gaudin et al.	2020	44.816	60.566	0.446	-0.201	0.114	–
Cantat-Gaudin & Anders	2020	44.816	60.566	0.446	-0.201	0.114	–
Soubiran et al.	2018	44.816	60.566	–	–	–	-3.64
Cantat-Gaudin et al.	2018	44.816	60.566	0.446	-0.201	0.114	–
Kharchenko et al.	2016	44.852	60.548	–	–	–	–
Dias et al.	2014	44.854	60.566	–	-0.99	1.17	–
Kharchenko et al.	2013	44.865	60.55	–	-1.42	-0.2	-40.0
Kharchenko et al.	2012	44.865	60.55	–	-1.42	-0.2	-40.0
Glushkova et al.	2010	44.856	60.566	–	–	–	–
Dias et al.	2002	44.854	60.566	–	-0.99	1.17	-40.0

💡 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–	1.93	1.85	1.67	13	-0.016	627	0.76	–
Liu et al.	2025	4.23	0.69	–	8	–	–	–	–
Almeida et al.	2025	1.93	1.98	–	13	–	627	–	–
Hunt & Reffert	2024	–	–	–	–	–	1173⁽¹⁾	–	–
Celli et al.	2024	–	–	–	7	–	627	–	–
Cavallo et al.	2024	1.89	1.99	–	5	-0.190	–	–	–
Hunt & Reffert	2023	2.04	1.99	1.67	5	–	–	–	–
Almeida et al.	2023	1.93	2.03	–	12	-0.016	1072⁽¹⁾	0.76	–
Just et al.	2023	–	–	–	16	–	16	–	–
Dias et al.	2021	1.93	1.98	–	13	0.157	–	–	–
Cantat-Gaudin et al.	2020	2.25	1.85	–	7	–	–	–	–
Cantat-Gaudin & Anders	2020	2.10	–	–	–	–	–	–	–
Soubiran et al.	2018	2.10	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.10	–	–	–	–	–	–	–
Kharchenko et al.	2016	1.00	1.55	–	16	–	–	–	–
Kharchenko et al.	2013	1.00	1.55	–	16	–	–	–	–
Kharchenko et al.	2012	1.00	1.55	–	16	–	–	–	–
Dias et al.	2002	1.00	1.55	–	16	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Collinder 34	53.6	44.83	60.57	0.44	-0.35	0.04	-55.55	0.23
AFGL 4029	6.2	45.21	60.54	0.44	-0.13	0.03	-30.61	0.14
IRAS 02575+6017	4.9	45.26	60.52	0.42	-0.06	-0.09	-30.61	0.36
CWNU 4436	4.5	44.87	60.57	0.23	-0.48	0.1	–	0.04
IRAS 02570+6028	4.0	45.18	60.63	0.42	-0.11	0.06	-30.54	0.21

💡 Note: The % column shows the percentage of members that SAI 24 shares with each listed object.

Visualization

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