The Albedo-Color Diversity of Transneptunian Objects

Lacerda, Pedro; Fornasier, S.; Lellouch, E.; Kiss, Csaba; Vilenius, E.; Santos-Sanz, P.; Rengel, Miriam; Müller, Thomas; Stansberry, J.; Duffárd, R.; Delsanti, A.; Guilbert-Lepoutre, A.

doi:10.1088/2041-8205/793/1/l2

Cited by 110 publications

(152 citation statements)

References 49 publications

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“…Pál et al 2015) the geometric albedos in the trans-Neptunian region are typically higher than this. The dark-neutral population of objects (Lacerda et al 2014) have typical geometric albedos of p V ≈ 5%, but practically no objects show p V < 4%. In the scattered disk which is the dynamical class of 2007 OR 10 the typical geometric albedos are between 4% and 9%.…”

Section: Possible Orbits Of the Satellitementioning

confidence: 99%

Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR₁₀

Kiss

Márton

Farkas-Takács

et al. 2017

ApJL

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ABSTRACT2007 OR 10 is currently the third largest known dwarf planet in the Transneptunian region, with an effective radiometric diameter of ∼1535 km. It has a slow rotation period of ∼45 h that was suspected to be caused by tidal interactions with a satellite undetected at that time. Here we report on the discovery of a likely moon of 2007 OR 10 , identified on archival Hubble Space Telescope WFC3/UVIS system images. Although the satellite is detected at two epochs, this does not allow an unambiguous determination of the orbit and the orbital period. A feasible 1.5-5.8·10 21 kg estimate for the system mass leads to a likely 35 to 100 d orbital period. The moon is about 4. m 2 fainter than 2007 OR 10 in HST images that corresponds to a diameter of 237 km assuming equal albedos with the primary. Due to the relatively small size of the moon the previous size and albedo estimates for the primary remains unchanged. With this discovery all trans-Neptunian objects larger than 1000 km are now known to harbour satellites, an important constraint for moon formation theories in the young Solar system.

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Section: Possible Orbits Of the Satellitementioning

confidence: 99%

Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR₁₀

Kiss

Márton

Farkas-Takács

et al. 2017

ApJL

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“…The color of 2013 SY 99 implies that it has a low albedo of p=0.05±0.03 (Fraser et al 2014;Lacerda et al 2014). …”

Section: Sy 99mentioning

confidence: 99%

OSSOS. V. Diffusion in the Orbit of a High-perihelion Distant Solar System Object

Bannister¹,

Shankman²,

Volk³

et al. 2017

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We report the discovery of the minor planet 2013 SY 99 on an exceptionally distant, highly eccentric orbit. With a perihelion of 50.0au, 2013 SY 99 's orbit has a semimajor axis of 730±40au, the largest known for a highperihelion trans-Neptunian object (TNO), and well beyond those of (90377) Sedna and 2012 VP 113 . Yet, with an aphelion of 1420±90au, 2013 SY 99 's orbit is interior to the region influenced by Galactic tides. Such TNOs are not thought to be produced in the current known planetary architecture of the solar system, and they have informed the recent debate on the existence of a distant giant planet. Photometry from the Canada-France-Hawaii Telescope, Gemini North, and Subaru indicate 2013 SY 99 is ∼250km in diameter and moderately red in color, similar to other dynamically excited TNOs. Our dynamical simulations show that Neptune's weak influence during 2013 SY 99 's perihelia encounters drives diffusion in its semimajor axis of hundreds of astronomical units over 4Gyr. The overall symmetry of random walks in the semimajor axis allows diffusion to populate 2013 SY 99 's orbital parameter space from the 1000 to 2000au inner fringe of the Oort cloud. Diffusion affects other known TNOs on orbits with perihelia of 45 to 49au and semimajor axes beyond 250au. This provides a formation mechanism that implies an extended population, gently cycling into and returning from the inner fringe of the Oort cloud.

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“…Santos-Sanz et al (2012) have studied 15 scattered disk objects and detached objects, including 2007 OR 10 , where these objects have a series of far-infrared thermal measurements taken with the Herschel Space Observatory. 8 The albedo of 2007 OR 10 was found to be p R ≈18% in the R band, hence this object is a member of the "bright & red" subgroup of the TNO population (Lacerda et al 2014). …”

Section: Introductionmentioning

confidence: 93%

“…This new value would place 2007 OR 10 as the third largest dwarf planet-see also Table 3 of Lellouch et al (2013), after Pluto and Eris. Even considering these refined values, this object is a member of the "bright & red" group of Lacerda et al (2014).…”

Section: Thermophysical Modelmentioning

confidence: 99%

LARGE SIZE AND SLOW ROTATION OF THE TRANS-NEPTUNIAN OBJECT (225088) 2007 OR₁₀ DISCOVERED FROM HERSCHEL AND K2 OBSERVATIONS

Pál

Kiss

Müller

et al. 2016

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We present the first comprehensive thermal and rotational analysis of the second most distant trans-Neptunian object (225088) 2007 OR 10 . 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 OR 10 is likely to be larger and darker than derived by earlier studies: we obtained a diameter of d = 1535 +75 −225 km which places (225088) 2007 OR 10 in the biggest top three trans-Neptunian objects. The corresponding visual geometric albedo is p V = 0.089 +0.031 −0.009 . The light curve analysis revealed a slow rotation rate of P rot = 44.81±0.37 h, superseded by a very few objects only. 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 P rot = 22.40 ± 0.18 h 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 -CH 4 , CO and N 2 -on the surface.

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The Albedo-Color Diversity of Transneptunian Objects

Cited by 110 publications

References 49 publications

Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR₁₀

Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR₁₀

OSSOS. V. Diffusion in the Orbit of a High-perihelion Distant Solar System Object

LARGE SIZE AND SLOW ROTATION OF THE TRANS-NEPTUNIAN OBJECT (225088) 2007 OR₁₀ DISCOVERED FROM HERSCHEL AND K2 OBSERVATIONS

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The Albedo-Color Diversity of Transneptunian Objects

Cited by 110 publications

References 49 publications

Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR10

Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR10

OSSOS. V. Diffusion in the Orbit of a High-perihelion Distant Solar System Object

LARGE SIZE AND SLOW ROTATION OF THE TRANS-NEPTUNIAN OBJECT (225088) 2007 OR10 DISCOVERED FROM HERSCHEL AND K2 OBSERVATIONS

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Resources

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Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR₁₀

Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR₁₀

LARGE SIZE AND SLOW ROTATION OF THE TRANS-NEPTUNIAN OBJECT (225088) 2007 OR₁₀ DISCOVERED FROM HERSCHEL AND K2 OBSERVATIONS