(532037) 2013 FY27

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(532037) 2013 FY27
Perihelion
35.199 AU (5.2657 Tm)
58.555 AU (8.7597 Tm)
Eccentricity0.3989
448.08 yr (163,660 d)
215.947°
0° 0m 7.92s /day
Inclination33.290°
186.922°
≈ 2202 June 15 ± 17 days
139.752°
Known satellites1[4][5][6]
Physical characteristics
Mean diameter
765+80
−85 km (effective diameter)[4]
742+78
−83 km (primary)[a][4]
0.170+0.045
−0.030[4]
Temperature22 K (perihelion) to
16 K (aphelion)
22.5[7]
3.15±0.03[4][3]

(532037) 2013 FY27 (

2002 MS4 (to within measurement uncertainties) as the largest unnamed object
in the Solar System.

Orbit

Orbit of 2013 FY27

2013 FY27 orbits the Sun once every 449 years. It will come to perihelion around November 2202,[3][b] at a distance of about 35.6 AU. It is currently near aphelion, 80 AU from the Sun, and, as a result, it has an apparent magnitude of 22.[1] Its orbit has a significant inclination of 33°.[3] The

2013 FZ27
were discovered by the same survey as 2013 FY27 and were announced within about a week of one another.

Physical properties

2013 FY27 has a diameter of about 740 kilometres (460 mi), placing it at a transition zone between medium-sized and large TNOs. Using the Atacama Large Millimeter Array and Magellan Telescopes, its albedo was found to be 0.17, and its colour to be moderately red. 2013 FY27 is one of the largest moderately red TNOs. The physical processes that lead to a lack of such moderately red TNOs larger than 800 kilometres (500 mi) are not yet well understood.

The brightness of 2013 FY27 varies by less than 0.06 mag over hours and days, suggesting that it either has a very long rotation period, an approximately spheroidal shape, or a rotation axis pointing towards Earth.[4]

Brown estimated, prior to the discovery of its satellite, that 2013 FY27 was very likely to be a dwarf planet, due to its large size.[10] However, Grundy et al. calculate that bodies such as 2013 FY27, less than about 1000 km in diameter, with albedos less than ≈0.2 and densities of ≈1.2 g/cm3 or less, may retain a degree of porosity in their physical structure, having never collapsed into fully solid bodies.[11]

The surface area of asteroid 532037 (2013 FY27) is similar to the area of the state of Texas. [12]

Satellite

S/2018 (532037) 1
Animation of 2013 FY27 and its satellite, imaged by the Hubble Space Telescope from January to July 2018
Discovery[4]
Discovered by
  • Scott Sheppard
  • Yanga R. Fernández
  • Arielle Moullet
Discovery date15 January 2018
Orbital characteristics[4]
>9800±40 km
≈19 d (for assumed density 1.6 g/cm3)[13]
Satellite of2013 FY27
Physical characteristics
Mean diameter
≈186 km (assuming equal albedos)[4]
Albedo0.170+0.045
−0.030 (assumed)
25.5[7]
6.15[c]

Using

provisional designation nor a proper name.[3] Assuming the two components have equal albedos, they are about 740 kilometres (460 mi) and 190 kilometres (120 mi) in diameter, respectively.[4] Follow-up observations were taken between May and July 2018 in order to determine the orbit of the satellite,[5] but the results of these observations remain yet to be published as of 2022.[7]
Once the orbit is known, the mass of the system can be determined.

See also

Notes

  1. ^ Assuming the two components have equal albedos
  2. ^ The uncertainty in the time of perihelion passage is ≈1 month (1-sigma) or 3.6 months (3-sigma).[3]
  3. ^ Given the primary's absolute magnitude of H = 3.15 and a magnitude difference of Δm = 3.00 between the primary and satellite, the sum of those magnitudes is the satellite's absolute magnitude, 6.15.[4][7]

References

  1. ^
    IAU Minor Planet Center
    . 31 March 2014. Retrieved 29 March 2018. (K13F27Y)
  2. ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2 April 2014.
  3. ^ a b c d e f g "JPL Small-Body Database Browser: (2013 FY27)" (last observation: 2022-01-09; arc: 10.82 years). Jet Propulsion Laboratory. Retrieved 6 March 2023.
  4. ^
    S2CID 119522310
    .
  5. ^ a b Scott Sheppard (21 March 2018). "The Orbit of the Newly Discovered Satellite around the Dwarf Planet 2013 FY27 - HST Proposal 15460". Retrieved 9 September 2018.
  6. ^ Scott Sheppard (7 April 2017). "A Satellite Search of a Newly Discovered Dwarf Planet – HST Proposal 15248". Retrieved 9 September 2018.
  7. ^ a b c d Grundy, Will (21 March 2022). "532037 (2013 FY27)". Lowell Observatory. Retrieved 3 January 2023.
  8. ^ Lakdawalla, Emily (2 April 2014). "More excitement in the outermost solar system: 2013 FY27, a new dwarf planet". www.planetary.org/blogs. The Planetary Society. Retrieved 18 January 2017.
  9. ^ "JPL Small-Body Database Search Engine: orbital class (TNO) and H < 3.2 (mag)". JPL Solar System Dynamics. Retrieved 1 June 2019.
  10. ^ Mike Brown, How many dwarf planets are there in the outer solar system? Archived 18 October 2011 at the Wayback Machine (assumes H = 3.3)
  11. ^ W.M. Grundy, K.S. Noll, M.W. Buie, S.D. Benecchi, D. Ragozzine & H.G. Roe, 'The Mutual Orbit, Mass, and Density of Transneptunian Binary Gǃkúnǁʼhòmdímà ((229762) 2007 UK126)', Icarus [1] Archived 7 April 2019 at the Wayback Machine doi: 10.1016/j.icarus.2018.12.037,
  12. ^ https://www.spacereference.org/asteroid/532037-2013-fy27
  13. ^ Johnston, Wm. Robert (27 May 2019). "(532037) 2013 FY27". Johnston's Archive. Retrieved 3 January 2023.
  14. ^ Green, Daniel W. E. (10 August 2018). "CBET 4537: 2013 FY27". Central Bureau Electronic Telegram. Central Bureau for Astronomical Telegrams. Retrieved 9 September 2018.

External links

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