2023MNRAS.525L..17G

Query : 2023MNRAS.525L..17G

2023MNRAS.525L..17G - Mon. Not. R. Astron. Soc., 525, L17-L21 (2023/October-2)

Spectral type and geometric albedo of (98943) 2001 CC21, the Hayabusa2# mission target.

GEEM J., ISHIGURO M., GRANVIK M., NAITO H., AKITAYA H., SEKIGUCHI T., HASEGAWA S., KURODA D., OONO T., BACH Y.P., JIN S., IMAZAWA R., KAWABATA K.S., TAKAGI S., YOSHIKAWA M., DJUPVIK A.A., GADEBERG J.T., PURSIMO T., DURFELDT PEDROS O., THOMSEN J.S. and GRAY Z.

Abstract (from CDS):

We conducted optical polarimetry and near-infrared spectroscopy of Japan Aerospace Exploration Agency (JAXA)'s Hayabusa2# mission target, (98943) 2001 CC21, in early 2023. Our new observations indicate that this asteroid has a polarimetric inversion angle of ∼20°, absorption bands around 0.9 and 1.9 μm, and a geometric albedo of 0.23 ± 0.04. All these features are consistent with those of S types but inconsistent with L types. Based on this evidence, we conclude that JAXA's Hayabusa2# spacecraft will explore an S-type asteroid (more specifically, an L or LL chondrite-like object) with albedo and size (0.44-0.53 km when we assume the absolute magnitude of 18.8) similar to (25143) Itokawa.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): minor planets, asteroids: individual: (98943) 2001 CC21 - techniques: polarimetric - techniques: spectroscopic

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * phi Cas s*y 01 20 04.9164665856 +58 13 53.807643876 6.15 5.66 4.98 4.34 3.78 F0Ia 285 0
2 HD 236928 * 02 02 42.0929404728 +60 15 26.433482364   10.00 9.07     A4Ib 108 0
3 * ksi02 Cet * 02 28 09.5570589539 +08 27 36.216809306 4.14 4.25 4.30 4.29 4.34 B9III 352 0
4 HD 29333 * 04 38 25.9928583288 +29 23 14.495156196 9.960 9.460 8.790     A0V 29 0
5 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
6 HD 251204 s*b 06 05 05.6666038296 +23 23 38.533246404 10.21 10.52 10.2     B0 64 0
7 HD 42182 PM* 06 09 35.9118668568 +05 40 08.054105916   9.31 8.38     G0 54 0
8 HD 65629 PM* 07 59 53.3907736920 +09 53 55.315485276       7.6   G5 31 0
9 BD+48 1646 * 08 28 34.6240280304 +47 42 14.521920624   9.55 8.93     ~ 13 0

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