2016AJ....151..117P

Query : 2016AJ....151..117P

2016AJ....151..117P - Astron. J., 151, 117-117 (2016/May-0)

Large size and slow rotation of the trans-neptunian object (225088) 2007 OR_10 discovered from Herschel and K2 observations.

PAL A., KISS C., MULLER T.G., MOLNAR L., SZABO R., SZABO G.M., SARNECZKY K. and KISS L.L.

Abstract (from CDS):

We present the first comprehensive thermal and rotational analysis of the second most distant trans-Neptunian object (TNOs) (225088) 2007 OR10. We combined optical light curves provided by the Kepler Space Telescope-K2 extended mission and thermal infrared data provided by the Herschel Space Observatory. We found that (225088) 2007 OR10 is likely to be larger and darker than derived by earlier studies: we obtained a diameter of d={1535}_{-225}^{+75} km which places (225088) 2007 OR10 in the biggest top three TNOs. The corresponding visual geometric albedo is {p}_{V}={0.089}{-0.009}^{+0.031} . The light-curve analysis revealed a slow rotation rate of Prot=44.81±0.37 hr, superseded by very few objects. The most likely light-curve solution is double-peaked with a slight asymmetry; however, we cannot safely rule out the possibility of having a rotation period of Prot=22.40±0.18 hr, which corresponds to a single-peaked solution. Due to the size and slow rotation, the shape of the object should be a MacLaurin ellipsoid, so the light variation should be caused by surface inhomogeneities. Its newly derived larger diameter also implies larger surface gravity and a more likely retention of volatiles-CH4, CO, and N2-on the surface.

Journal keyword(s): Kuiper belt objects: individual: 225088 OR10 - methods: observational - minor planets, asteroids: general - radiation mechanisms: thermal - techniques: photometric

VizieR on-line data: <Available at CDS (J/AJ/151/117): table1.dat>

Simbad objects: 1

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Number of rows : 1

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	* 45 Aqr	PM*	22 19 00.7407950088	-13 18 17.973781488		7.045	5.959			K0III	18	0

Query : 2016AJ....151..117P

Basic data :

* 45 Aqr -- High Proper Motion Star

* (*,BD,...), PM* (2007A&A), NIR (2MASS), IR (IRAS)

22 19 00.7407950088 -13 18 17.973781488 (Optical) [ 0.0485 0.0331 90 ] A 2020yCat.1350....0G

22 16 19.8260681863 -13 33 21.611086778 [ 0.0485 0.0331 90 ]

046.4471821049543 -51.8542639502676 [ 0.0485 0.0331 90 ]

73.431 -8.823 [0.071 0.046 90] A 2020yCat.1350....0G

V(km/s) 30.0 [2] / z(~) 0.000100 [0.000007] / cz 30.00 [2.00] E 1953GCRV..C......0W

9.8323 [0.0438] A 2020yCat.1350....0G

K0III C 1988MSS...C04....0H

B 7.045 [0.015] D 2000A&A...355L..27H

V 5.959 [0.010] D 2000A&A...355L..27H

G 5.669825 [0.002827] C 2020yCat.1350....0G

J 3.992 [0.256] D 2003yCat.2246....0C

H 3.361 [0.212] D 2003yCat.2246....0C

K 3.269 [0.262] D 2003yCat.2246....0C

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*` 45 Aqr`**	`HIC 110179`	`SKY# 42514`	`YZ V11 8337`
`BD-14 6255`	`HIP 110179`	`SRS 17341`	`YZ 0 5777`
`GC 31199`	`HR 8508`	`TIC 206281569`	`Gaia DR2 2600499210491378560`
`GCRV 14031`	`IRAS 22163-1333`	`TYC 5810-1304-1`	`Gaia DR3 2600499210491378560`
`GEN# +1.00211676`	`2MASS J22190074-1318180`	`UBV 19094`
`GSC 05810-01304`	`PPM 240100`	`UBV M 26307`
`HD 211676`	`SAO 164996`	`WEB 19774`

References (18 between 1850 and 2026) (Total 18)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Data at NED - NASA/IPAC Extragalactic Database : * 45 Aqr

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`BD-14 6255`	`GSC 05810-01304`	`HD 211676`	`HIC 110179`	`HIP 110179`
`HR 8508`	`IRAS 22163-1333`	`2MASS J22190074-1318180`	`PPM 240100`	`SAO 164996`
`TYC 5810-1304-1`	`Gaia DR2 2600499210491378560`	`Gaia DR3 2600499210491378560`

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