Sh2-228

0.19 UTI

0.43

C_N

0.41

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 43

Stellar density (N₅₀/rad) 2.0 [N/pc²]

C3 classification DC

C_N 0.43 Poorly populated
C_dens 0.41 Loose
C_C3 0.12 Very low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Sh2-228 is a poorly populated, loose object of very low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane. No fundamental parameter values are available for this object. It is rarely studied in the literature, with no articles listed in the last 23 years.

Note: This object shares a significant percentage of members with 2 later reported entries. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

No fundamental parameters

Bica et al. (2003)
Classified as infrared cluster (IRC).

Data

🔍 Search references for Sh2-228 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–	78.393	37.416	0.291	-0.04	-1.438	–
Bica et al.	2003	78.359	37.453	–	–	–	–

💡 Note: The UCC values are estimated from its identified members.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
IRAS 05100+3723	55.8	78.37	37.43	0.29	0.02	-1.47	–	0.03
UBC 1609	27.9	78.55	37.39	0.26	-0.11	-1.44	2.43	0.13

💡 Note: The % column shows the percentage of members that Sh2-228 shares with each listed object.

Visualization

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