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NGC 189
NGC 189 from DSS
Observation data (J2000 epoch)
Right ascension	0 39 28.8
Declination	+61° 6 54
Distance	4,200 ly (1,300 pc)
Apparent magnitude (V)	8.8
Apparent dimensions (V)	0.120°
Physical characteristics
Estimated age	510 Myr
Other designations	Cr 462, C 0036+608, OCL 301
Associations
Constellation	Cassiopeia
See also: Open cluster, List of open clusters

NGC 189 is an open cluster in the Cassiopeia constellation. It was discovered by Caroline Herschel on 27 September 1783, and independently rediscovered by John Herschel on 27 October 1829.

NGC 189 orbits the Milky Way on a nearly circular orbit with an eccentricity of 0.053 and an orbital period of 231,000 years. It enters the solar circle at parts of its orbit, and is part of the thin disk of the Milky Way.

References

1. ^ Kharchenko, N. V.; et al. (2013). "Global survey of star clusters in the Milky Way. II. The catalogue of basic parameters". Astronomy & Astrophysics. 558: A53. arXiv:1308.5822. Bibcode:2013A&A...558A..53K. doi:10.1051/0004-6361/201322302. S2CID 118548517.
2. "NGC 189". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 12 February 2021.
3. Seligman, Courtney. "New General Catalogue objects: NGC 150 – 199". cseligman.com. Retrieved 12 February 2021.
4. Yontan, Talar; Bilir, Selçuk; Çakmak, Hikmet; Raúl, Michel; Banks, Timothy; Soydugan, Esin; Canbay, Remziye; Taşdemir, Seval (2023). "CCD UBV and Gaia DR3 based analysis of NGC 189, NGC 1758 and NGC 7762 open clusters". Advances in Space Research. 72 (4): 1454–1473. arXiv:2304.04294. Bibcode:2023AdSpR..72.1454Y. doi:10.1016/j.asr.2023.04.015.

External links

• NGC 189 @ SEDS NGC objects pages
• NGC 189 at NightSkyInfo.com
• NGC 189 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

v t e Constellation of Cassiopeia
List of stars in Cassiopeia Cassiopeia in Chinese astronomy
Stars	Bayer α (Schedar) β (Caph) γ (Navi/Tsih) δ (Ruchbah) ε (Segin) ζ (Fulu) η (Achird) θ (Marfak) ι κ λ μ ν ξ ο π ρ σ τ υ υ (Castula) φ χ ψ ω Flamsteed 1 2 4 6 9 10 12 42 47 48 (A) 49 50 54 Variable R S TZ WZ YZ (21) AO AR PZ V373 V509 V547 V669 V705 V762 V863 V773 V987 V1022 V1405 HR 5 91 144 196 244 273 297 743 932 8832 8853 8881 HD 861 7924 7977 15558 17156 (Nushagak) 240210 240237 240429 240430 Other BD+60°2522 Gliese 49 IRAS 23304+6147 LS I +61 303 PSR J0205+6449 Tycho G 4U 0142+61 WR 2 WR 3
Exoplanets HD 7924 b HD 17156 b HD 219134 b c d e (h) f g HD 240210 b HD 240237 b
Star clusters Messier 52 Messier 103 NGC 103 NGC 110 NGC 129 NGC 133 NGC 136 NGC 146 NGC 189 NGC 225 NGC 358 NGC 366 NGC 381 NGC 433 NGC 436 NGC 457 NGC 559 NGC 637 NGC 654 NGC 659 NGC 663 NGC 1027 NGC 7789 NGC 7790 Trumpler 3
Nebulae	NGC 281 7635 Other 3C 58 Cassiopeia A Heart Nebula IC 289 IC 1805 KjPn 8 LBN 114.55+00.22 Sh 2-185 Westerhout 5
Galaxies	NGC 147 185 278 Other Andromeda VII 3C 20 3C 35 Dwingeloo 1 Dwingeloo 2 MB 3 IC 10 Maffei 1 Maffei 2 QSO B0153+744
Astronomical events SN 1181 SN 1572 (B)
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