2014 MH 70

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Asteroid
2014 MH 70
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type Plutino ,
"Distant Object"
Major semi-axis 39.497  AU
eccentricity 0.17
Perihelion - aphelion 32.768 AU - 46.227 AU
Inclination of the orbit plane 3.3 °
Length of the ascending node 97.5 °
Argument of the periapsis 91.2 °
Time of passage of the perihelion June 7, 1922
Sidereal period 248 a 2.8 M
Mean orbital velocity 4.701 km / s
Physical Properties
Medium diameter approx. 315 km
Albedo 0.08-0.09
Absolute brightness 5.9 likes
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery June 28, 2014
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

2014 MH 70 is a large trans-Neptunian object in the Kuiper Belt , which is classified as Plutino in terms of orbit dynamics . Due to its size, the asteroid is one of the dwarf planet candidates .

discovery

2014 MH 70 was discovered on June 28, 2014 by a team of astronomers consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, as part of the Pan-STARRS project with the 1.8 m -Ritchey Chretien Telescope (PS1) discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 17, 2016.

After its discovery, in 2014 MH 70 could be identified on photos, which were also taken as part of the Pan-STARRS program, going back to September 4, 2010 and thus its observation period was extended by four years in order to calculate its orbit more precisely. So far, the planetoid has only been observed through the Pan-STARRS telescope. In December 2018, a total of 119 observations were made over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in October 2017. (As of March 27, 2019)

properties

Orbit

2014 MH 70 orbits the sun in 248.23 years on a slightly elliptical orbit between 32.76  AU and 46.23 AU from its center. The orbit eccentricity is 0.170, the orbit is 3.28 ° inclined to the ecliptic . The planetoid is currently 45.07 AU from the Sun. He passed through perihelion for the last time in 1922, so the next perihelion is likely to take place in 2170.

Marc Buie ( DES ) classifies the planetoid as Plutino ( 2: 3 resonance with Neptune ), while the Minor Planet Center does not have a specific classification; the latter lists it as a non-SDO and generally as a “distant object” .

size

A diameter of 315 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.9  m . Based on this diameter, the total surface area is around 312,000 km 2 . The apparent magnitude of 2014 MH 70 is 22.55  m .

Since it is conceivable that 2014 MH 70 is in hydrostatic equilibrium due to its size and could therefore be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown expects that it is at 2014 MH 70 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 MH 70
year Dimensions km source
2018 336.0 Johnston
2018 315.0 Brown
The most precise determination is marked in bold .

See also

Web links

Individual evidence

  1. ↑ a b Marc W. Buie : Orbit Fit and Astrometric record for 14MH70 . SwRI (Space Science Department). Retrieved March 27, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 27, 2019.
  3. ↑ a b c 2014 MH70 at the IAU Minor Planet Center (English) Retrieved on March 27, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-0151: 2014 MH70 . IAU . July 17, 2016. Accessed March 27, 2019.
  6. ↑ 2014 MH70 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 27, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 27, 2019.
  8. ↑ 2014 MH70 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  9. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 27, 2019.