Alessi 36

0.32 UTI

0.8

C_N

1.0

C_dens

1.0

C_C3

0.3

C_lit

0.46

C_dup

N₅₀ (P>50% members) 230

Stellar density (N₅₀/rad) 30.0 [N/pc²]

C3 classification AA

C_N 0.8 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.3 Poorly studied
C_dup 0.46 Possibly duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Alessi 36 is a rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It is poorly studied in the literature.

⚠️ Warning: This is possibly a duplicate object, which shares a significant percentage of members with at least one previously reported entry. See table with shared members information.

Very close Low extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 22 along with Collinder_135.

Palma et al. (2025)
Part of multiple system G3, along with Collinder_135 and HSC_1949.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Alessi 36 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–	106.61	-37.644	3.605	-9.662	7.082	15.355
Hunt & Reffert	2024	106.565	-37.596	3.598	-9.669	7.046	14.546
Cavallo et al.	2024	106.763	-37.723	3.601	–	–	–
Hunt & Reffert	2023	106.565	-37.596	3.598	-9.669	7.046	14.546
Bica et al.	2019	106.588	-37.487	–	–	–	–

💡 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–	0.28	0.14	0.58	29	-0.030	100	–	–
Liu et al.	2025	0.32	0.09	–	35	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	100⁽¹⁾	–	–
Cavallo et al.	2024	0.28	0.62	–	21	-0.030	–	–	–
Hunt & Reffert	2023	0.28	0.14	0.58	29	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 210	96.5	106.61	-37.67	3.6	-9.68	7.09	15.36	0.01
UBC 7	53.5	106.63	-37.7	3.59	-9.69	7.06	15.28	0.73
Collinder 135	4.3	109.36	-36.95	3.34	-10.04	6.22	15.1	0.97

💡 Note: The % column shows the percentage of members that Alessi 36 shares with each listed object.

Visualization

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