Alessi 57

(DSH J1920.8+1540; FSR 0130; MWSC 3089)

0.36 UTI

0.3

C_N

0.1

C_dens

0.75

C_C3

0.31

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 3.2 [pc], 0.5 [pc^-2]

C3 classification AB

C_N 0.3 Poorly populated
C_dens 0.1 Very loose
C_C3 0.75 High quality
C_lit 0.31 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Alessi 57 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a large^* distance, above the mid-plane, affected by very high extinction. It is catalogued as a young cluster (see Parameters). It is poorly studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~6.89 kpc) differs significantly from the median photometric distance (~3.90 kpc).

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

Distant Very high extinction Young

Bica et al. (2019)
List of clusters and alike reported by B. Alessi.

Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: exposed cluster, without submm emission.

Data

🔍 Search references for Alessi 57 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–	290.223	15.679	0.145	-2.139	-5.243	15.436
Bica et al.	2019	290.222	15.682	–	–	–	–
Dias et al.	2014	290.225	15.677	–	0.92	-1.2	–
Morales et al.	2013	290.224	15.677	–	–	–	–
Bukowiecki et al.	2011	290.238	15.675	–	–	–	–
Kronberger et al.	2006	290.224	15.677	–	–	–	–
Dias et al.	2002	290.225	15.677	–	0.57	-5.89	–

💡 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–	3.9	6.66	–	22	–	976	–	–
Morales et al.	2013	3.90	–	–	–	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	976	–	–
Bukowiecki et al.	2011	0.76⁽¹⁾	9.56	–	22	–	–	–	–
Kronberger et al.	2006	3.90	6.66	–	–	–	–	–	–
Dias et al.	2002	3.90	6.66	–	–	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 4304	60.0	290.22	15.68	0.13	-2.16	-5.28	15.44	0.04

💡 Note: The % column shows the percentage of members that Alessi 57 shares with each listed object.

Visualization

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