CCD photometric studies of two Primitive C-type main-belt asteroids: (51) Nemausa and (52) Europa

IF 1.9 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

New Astronomy Pub Date : 2025-03-15 DOI:10.1016/j.newast.2025.102391

Shuang Wang, Yuangui Yang, Huiyu Yuan, Ligang Yu

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引用次数: 0

Abstract

We present new CCD photometry for primitive C-type main-belt asteroids (51) Nemausa and (52) Europa performed on several nights of 2016, by using the 60-cm telescope at Xinglong station of NAOC. From our new data, the rotation periods are determined as 7.784840 h for (51) Nemausa and 5.629960 h for (52) Europa. Based on the convex inversion method, the pole ambiguity was removed, and we refined pole directions and triaxial ratios as follows, (168 °,

- 6 0^{\circ}

) with

a / b = 1.09

and

b / c = 1.03

for (51) Nemausa, and a pole is derived as (256°, 32°) with

a / b = 1.04

and

b / c = 1.33

for (52) Europa. From the parameters of 49 asteroids, a statistic study was carried out. All these results will help us to understand the physical properties of pristine small objects in the solar system.

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来源期刊

New Astronomy 地学天文-天文与天体物理

CiteScore

4.00

自引率

10.00%

发文量

109

审稿时长

13.6 weeks

期刊介绍： New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation. New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.