(523691) 2014 DO 143

from Wikipedia, the free encyclopedia
Asteroid
(523691) 2014 DO 143
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type RKBO 1: 2 ,
"Distant Object"
Major semi-axis 47,458  AU
eccentricity 0.101
Perihelion - aphelion 42.685 AU - 52.231 AU
Inclination of the orbit plane 4.2 °
Length of the ascending node 180.6 °
Argument of the periapsis 332.5 °
Time of passage of the perihelion October 8, 2027
Sidereal period 326 a 11.2 M
Mean orbital velocity 4.288 km / s
Physical Properties
Medium diameter approx. 343 km
Albedo 0.08-0.09
Absolute brightness 5.7 likes
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery 20th February 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.

(523691) 2014 DO 143 is a large trans-Neptunian object in the Kuiper belt , which is classified as a resonant KBO ( Twotino ) in terms of railway dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 DO 143 was discovered on February 20, 2014 by a team of astronomers , consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, on images taken as part of the Pan-STARRS project with the 1 , 8 m Ritchey Chretien Telescope (PS1) at Haleakalā Observatory ( Maui ) on January 15, 2012, discovered. The discovery was announced on July 17, 2016 the asteroid was on 25 September 2018 the IAU , the Minor Planet -number 523 691 .

After its discovery, DO 143 could be identified in photos up to April 16, 2004, which were taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ), thus changing its observation period Extend ten years to calculate its orbit more accurately. Since then, the planetoid has been observed through various earth-based telescopes. In October 2018, there were a total of 168 observations over a period of 14 years. The last observation so far was carried out in March 2018 at the Pan-STARRS telescope. (As of March 20, 2019)

properties

Orbit

2014 DO 143 orbits the sun in 326.94 years on a slightly elliptical orbit between 42.68  AU and 52.23 AU from its center. The orbit eccentricity is 0.101, the orbit is inclined 4.18 ° to the ecliptic . The planetoid is currently 42.76 AU from the Sun. He will next pass perihelion in 2027, so the last perihelion should have occurred in 1700.

Marc Buie ( DES ) classifies the planetoid as Twotino (RKBO 1: 2), while the Minor Planet Center does not have a specific classification; the latter classifies it as a non-SDO and generally as a “distant object” .

size

A diameter of 343 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.7  m . Based on this diameter, the total surface area is around 370,000 km 2 . The apparent brightness of 2014 DO 143 is 22.14  m .

Since it is conceivable that 2014 DO 143 is in hydrostatic equilibrium due to its size and could thus be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown believes that it is in 2014 DO 143 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 DO 143
year Dimensions km source
2018 321.0 Johnston
2018 343.0 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 523691 . SwRI (Space Science Department). Retrieved March 20, 2019.
  2. ↑ a b c (523691) 2014 DO143 at the IAU Minor Planet Center (English) Retrieved March 20, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2016-O193: 2014 DO143 . IAU . July 17, 2016. Retrieved March 20, 2019.
  5. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 20, 2019. Reference there: MPC 111779
  6. ↑ (523691) 2014 DO143 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 20, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 20, 2019.
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 20, 2019.
  9. ↑ (523691) 2014 DO143 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  10. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 20, 2019.