ASCC 90

(MWSC 2655; Alessi 41)

0.86 UTI

0.54

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 58

Stellar density (N₅₀/rad) 5.8 [N/pc²]

C3 classification AB

C_N 0.54 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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ASCC 90 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is very well-studied in the literature.

Close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for ASCC 90 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–	264.778	-34.832	1.731	-1.616	-2.724	7.403
Li et al.	2025	264.777	-34.874	1.713	-1.63	-2.681	–
Wei et al.	2025	264.794	-34.886	1.733	-1.608	-2.724	–
Almeida et al.	2025	264.743	-34.855	–	–	–	–
Alfonso et al.	2024	264.838	-34.888	1.691	-1.579	-2.731	–
Hunt & Reffert	2024	264.762	-34.817	1.706	-1.529	-2.655	6.278
Cavallo et al.	2024	264.63	-34.83	1.713	–	–	–
Hunt & Reffert	2023	264.762	-34.817	1.706	-1.529	-2.655	6.278
Tarricq et al.	2022	264.779	-34.892	1.729	-1.591	-2.741	–
Dias et al.	2021	264.743	-34.855	1.718	-1.618	-2.706	7.722
Cantat-Gaudin et al.	2020	264.777	-34.874	1.713	-1.63	-2.681	–
Cantat-Gaudin & Anders	2020	264.777	-34.874	1.713	-1.63	-2.681	–
Soubiran et al.	2018	264.777	-34.874	–	–	–	7.27
Bica et al.	2019	264.775	-34.795	–	–	–	–
Cantat-Gaudin et al.	2018	264.777	-34.874	1.713	-1.63	-2.681	–
Kharchenko et al.	2016	264.771	-34.815	–	–	–	–
Dias et al.	2014	264.779	-34.8	–	0.3	-0.8	–
Kharchenko et al.	2013	264.78	-34.815	–	-3.0	-3.65	–
Piskunov et al.	2008	264.768	-34.803	–	–	–	–
Kharchenko et al.	2005	264.78	-34.8	–	-2.49	-3.64	–
Dias et al.	2002	264.779	-34.8	–	-2.49	-3.64	–

💡 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–	0.55	0.85	1.05	646	0.083	272	0.33	–
Li et al.	2025	0.54	0.68	–	963	-0.138	–	–	–
Wei et al.	2025	0.65	0.61	–	832	0.250	313	0.33	–
Almeida et al.	2025	0.55	0.85	–	628	–	197	–	–
Alfonso et al.	2024	0.56	0.32	–	1087	0.083	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	272⁽¹⁾	–	–
Cavallo et al.	2024	0.56	1.19	–	363	0.100	–	–	–
Hunt & Reffert	2023	0.55	0.68	1.05	409	–	–	–	–
Tarricq et al.	2022	0.55	–	–	851	–	–	–	–
Dias et al.	2021	0.55	0.85	–	628	0.083	–	–	–
Cantat-Gaudin et al.	2020	0.56	0.32	–	813	–	–	–	–
Cantat-Gaudin & Anders	2020	0.57	–	–	–	–	–	–	–
Soubiran et al.	2018	0.57	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.57	–	–	–	–	–	–	–
Kharchenko et al.	2016	0.53	0.93	–	646	–	–	–	–
Kharchenko et al.	2013	0.53	0.93	–	646	–	–	–	–
Piskunov et al.	2008	0.50	0.93	–	646	–	–	–	–
Kharchenko et al.	2005	0.50	0.93	–	646	–	–	–	–
Dias et al.	2002	0.50	0.93	–	646	–	–	–	–

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

Visualization

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