2022MNRAS.516L..53G

Query : 2022MNRAS.516L..53G

2022MNRAS.516L..53G - Mon. Not. R. Astron. Soc., 516, L53-L57 (2022/October-2)

(3200) Phaethon polarimetry in the negative branch: new evidence for the anhydrous nature of the DESTINY+ target asteroid.

GEEM J., ISHIGURO M., TAKAHASHI J., AKITAYA H., KAWABATA K.S., NAKAOKA T., IMAZAWA R., MORI F., JIN S., BACH Y.P., JO H., KURODA D., HASEGAWA S., YOSHIDA F., ISHIBASHI K., SEKIGUCHI T., BENIYAMA J., ARAI T., IKEDA Y., SHINNAKA Y., GRANVIK M., SILTALA L., DJUPVIK A.A., KASIKOV A., PINTER V. and KNUDSTRUP E.

Abstract (from CDS):

We report on the first polarimetric study of (3200) Phaethon, the target of JAXA's DESTINY+ mission, in the negative branch to ensure its anhydrous nature and to derive an accurate geometric albedo. We conducted observations at low phase angles (Sun-target-observer angle, α = 8.8-32.4°) from 2021 October to 2022 January and found that Phaethon has a minimum polarization degree Pmin = -1.3 ± 0.1 per cent, a polarimetric slope h = 0.22 ± 0.02 per cent deg–1, and an inversion angle α0 = 19.9 ± 0.3°. The derived geometric albedo is pV = 0.11 (in the range of 0.08-0.13). These polarimetric properties are consistent with anhydrous chondrites, contradict hydrous chondrites, and typical cometary nuclei.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: polarimetric - minor planets, asteroids: individual: (3200) Phaethon

CDS comments: BD +2 3739 is a probable misprint for BD +32 3739 (unpolarized star).

Simbad objects: 11

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Number of rows : 11
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 BD+64 106 ** 00 57 36.6894556320 +64 51 34.907455548 10.82 11.01   10.21   B1V 77 0
2 HD 236928 * 02 02 42.0929404728 +60 15 26.433482364   10.00 9.07     A4Ib 108 0
3 HD 14069 * 02 16 45.1936420248 +07 41 10.637150532   9.21 9.06     A0 61 0
4 V* CC Cas SB* 03 14 05.3361655368 +59 33 48.485582712 7.07 7.56 7.08     O8.5III(n)((f)) 308 0
5 HD 21447 * 03 30 00.1828170168 +55 27 06.506069256 5.160 5.140 5.090 5.01 5.02 A1Va 147 0
6 HD 25443 * 04 06 08.0655259656 +62 06 06.607649268 6.45 6.998 6.766     B0.5III 155 0
7 HD 29333 * 04 38 25.9928583288 +29 23 14.495156196 9.960 9.460 8.790     A0V 29 0
8 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
9 HD 331891 * 20 12 02.1491491944 +32 47 43.692993636   9.53 9.31     A0 67 0
10 HD 204827 SB* 21 28 57.7592315784 +58 44 23.238427956 8.63 8.74 7.94 7.25 6.76 O9.5IV 372 0
11 HD 212311 * 22 21 58.5830044224 +56 31 52.717561716   8.20 8.12     A0 65 0

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