Alessi 57

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

0.49 UTI

0.3

C_N

0.88

C_dens

0.75

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 30

Radius (P>50% members) 1.3 [arcmin]

C3 classification AB

C_N 0.3 Poorly populated
C_dens 0.88 Dense
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Alessi 57 is a poorly populated, dense 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 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

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	–
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	6.54	–	–	–	–	–	–
Kronberger et al.	2006	3.90	6.54	–	–	–	–	–	–
Dias et al.	2002	3.90	6.54	–	–	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 4304	60.0	290.22	15.68	0.13	-2.16	-5.28	15.44	0.05

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

Visualization

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