NGC 1663

(MWSC 426)

0.23 UTI

0.0

C_N

0.01

C_dens

0.38

C_C3

0.38

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 16

Radius (P>50% members) 7.2 [arcmin]

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.38 Low quality
C_lit 0.38 Poorly studied
C_dup 1.0 Unique

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

Overview

ℹ️

NGC 1663 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, well below the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~7.65 kpc) differs significantly from the median photometric distance (~1.49 kpc).

⚠️ 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.

Relatively close Moderate extinction Old

Cantat-Gaudin et al. (2020)
Historically described as poor and irregular. Gaia DR2 data show large dispersion in proper motion and parallax, inconsistent with a physical cluster. More details in Appendix A of the article.

Data

🔍 Search references for NGC 1663 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	72.344	13.114	0.131	0.516	-0.786	23.774
Just et al.	2023	72.307	13.169	–	–	–	–
Angelo et al.	2019	72.35	13.14	–	–	–	–
Loktin & Popova	2017	72.315	13.148	–	1.462	-7.315	–
Kharchenko et al.	2016	72.307	13.169	–	–	–	–
Dias et al.	2014	72.242	13.148	–	2.18	-2.9	–
Kharchenko et al.	2013	72.315	13.17	–	2.56	-5.07	–

💡 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]	Bfr	BSS
Just et al.	2023	–	–	–	2512	–	309	–	–
Angelo et al.	2019	2.40	–	–	5010	–	15	–	–
Loktin & Popova	2017	1.16	1.41	–	631	–	–	–	–
Kharchenko et al.	2016	1.49	1.29	–	2512	–	–	–	–
Kharchenko et al.	2013	1.49	1.29	–	2512	–	–	–	–

Visualization

ℹ️