2017ApJ...839L..15G

Query : 2017ApJ...839L..15G

2017ApJ...839L..15G - Astrophys. J., 839, L15-L15 (2017/April-2)

Discovery and physical characterization of a large scattered disk object at 92 au.

GERDES D.W., SAKO M., HAMILTON S., ZHANG K., KHAIN T., BECKER J.C., ANNIS J., WESTER W., BERNSTEIN G.M., SCHEIBNER C., ZULLO L., ADAMS F., BERGIN E., WALKER A.R., MUELLER J.H., ABBOTT T.M.C., ABDALLA F.B., ALLAM S., BECHTOL K., BENOIT-LEVY A., BERTIN E., BROOKS D., BURKE D.L., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., CUNHA C.E., DA COSTA L.N., DESAI S., DIEHL H.T., EIFLER T.F., FLAUGHER B., FRIEMAN J., GARCIA-BELLIDO J., GAZTANAGA E., GOLDSTEIN D.A., GRUEN D., GSCHWEND J., GUTIERREZ G., HONSCHEID K., JAMES D.J., KENT S., KRAUSE E., KUEHN K., KUROPATKIN N., LAHAV O., LI T.S., MAIA M.A.G., MARCH M., MARSHALL J.L., MARTINI P., MENANTEAU F., MIQUEL R., NICHOL R.C., PLAZAS A.A., ROMER A.K., ROODMAN A., SANCHEZ E., SEVILLA-NOARBE I., SMITH M., SMITH R.C., SOARES-SANTOS M., SOBREIRA F., SUCHYTA E., SWANSON M.E.C., TARLE G., TUCKER D.L., ZHANG Y. (The DES Collaboration)

Abstract (from CDS):

We report the observation and physical characterization of the possible dwarf planet 2014 UZ224 ("DeeDee"), a dynamically detached trans-Neptunian object discovered at 92 au. This object is currently the second-most distant known trans-Neptunian object with reported orbital elements, surpassed in distance only by the dwarf planet Eris. The object was discovered with an r-band magnitude of 23.0 in data collected by the Dark Energy Survey between 2014 and 2016. Its 1140 year orbit has (a,e,i)=(109 au,0.65,26○ / . 8). It will reach its perihelion distance of 38 au in the year 2142. Integrations of its orbit show it to be dynamically stable on Gyr timescales, with only weak interactions with Neptune. We have performed follow-up observations with ALMA, using 3 hr of on-source integration time to measure the object's thermal emission in the Rayleigh-Jeans tail. The signal is detected at 7σ significance, from which we determine a V-band albedo of 13.1–2.4+3.3(stat)–1.4+2.0(sys) percent and a diameter of 635–61+57(stat)–39+32(sys) km, assuming a spherical body with uniform surface properties.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): infrared: planetary systems - Kuiper belt: general - methods: observational - techniques: photometric - techniques: photometric

Simbad objects: 4

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Number of rows : 4
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 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1614 2
2 ICRF J025741.0-121201 Bla 02 57 41.00458539 -12 12 01.3810869   19   17.72   ~ 80 1
3 QSO B0420-0127 Bla 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1263 3
4 ESO 362-21 BLL 05 22 57.98464178 -36 27 30.8512953   15.26 14.62 14.48   ~ 873 2

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