FSR 1666

0.52 UTI

0.54

C_N

0.47

C_dens

1.0

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 58

Stellar density (N₅₀/rad) 2.3 [N/pc²]

C3 classification AA

C_N 0.54 Moderately populated
C_dens 0.47 Loose
C_C3 1.0 Very high quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 1666 is a moderately populated, loose object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, young cluster (see Parameters). It is poorly studied in the literature.

Distant High extinction Massive Near-solar metallicity Young

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

Cavallo et al. (2024)
Wood sample.

Data

🔍 Search references for FSR 1666 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–	207.167	-61.439	0.281	-6.065	-1.687	114.488
Hunt & Reffert	2024	207.196	-61.434	0.275	-6.062	-1.691	81.052
Cavallo et al.	2024	207.041	-61.446	0.275	–	–	–
Hunt & Reffert	2023	207.196	-61.434	0.275	-6.062	-1.691	81.052
Morales et al.	2013	207.146	-61.433	–	–	–	–
Froebrich et al.	2007	207.146	-61.433	–	–	–	–

💡 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–	3.305	4.525	3.11	39	-0.310	1046	–	–
Hunt & Reffert	2024	–	–	–	–	–	1046⁽¹⁾	–	–
Cavallo et al.	2024	3.18	4.57	–	17	-0.310	–	–	–
Hunt & Reffert	2023	3.43	4.48	3.11	61	–	–	–	–

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

Visualization

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