FSR 1668

(MWSC 2180)

0.33 UTI

0.0

C_N

0.36

C_dens

0.75

C_C3

0.26

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 1.2 [pc], 1.8 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.36 Loose
C_C3 0.75 High quality
C_lit 0.26 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

FSR 1668 is a sparse, loose object of high C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~2.81 kpc) differs significantly from the median photometric distance (~1.18 kpc).

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

Relatively close Moderate extinction Metal-rich Intermediate age

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.10 (50th percentile), false positive? (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.10 (50th percentile), false positive? (human-assigned).

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 FSR 1668 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	208.82	-61.669	0.356	-4.301	-2.187	–
Hunt & Reffert	2024	208.801	-61.677	0.377	-4.269	-2.184	–
Cavallo et al.	2024	208.842	-61.656	0.377	–	–	–
Hunt & Reffert	2023	208.801	-61.677	0.377	-4.269	-2.184	–
Just et al.	2023	208.714	-61.572	–	–	–	–
Dib et al.	2018	208.725	-61.575	–	–	–	–
Joshi et al.	2016	208.725	-61.575	–	–	–	–
Kharchenko et al.	2016	208.714	-61.572	–	–	–	–
Kharchenko et al.	2013	208.725	-61.575	–	-10.42	-1.23	–
Morales et al.	2013	208.704	-61.57	–	–	–	–
Froebrich et al.	2007	208.704	-61.57	–	–	–	–

💡 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–	1.18	2.28	2.68	794	0.940	248	–	–
Hunt & Reffert	2024	2.43	3.25	2.68	11	–	437⁽¹⁾	–	–
Cavallo et al.	2024	3.53	3.26	–	45	0.940	–	–	–
Hunt & Reffert	2023	2.43	3.25	2.68	11	–	–	–	–
Just et al.	2023	–	–	–	794	–	58	–	–
Dib et al.	2018	1.18	–	–	794	–	–	–	–
Joshi et al.	2016	1.18	1.31	–	794	–	–	–	–
Kharchenko et al.	2016	1.18	1.31	–	794	–	–	–	–
Kharchenko et al.	2013	1.18	1.31	–	794	–	–	–	–

(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 2740	96.0	208.81	-61.68	0.38	-4.29	-2.17	-41.43	0.18

💡 Note: The % column shows the percentage of members that FSR 1668 shares with each listed object.

Visualization

ℹ️

1 2