(172034) 2001 WR1

Source: Wikipedia, the free encyclopedia.

(172034) 2001 WR1
Discovery
LD)
Physical characteristics
Mean diameter
Synodic rotation period
8.0475±0.0003 h[7][a]
0.34[4][5][6]
S[8][9]
17.76[1][3]

(172034) 2001 WR1,

numbering in December 2007.[1]

Orbit and classification

Animated orbital diagram for 2001 WR1 from 1 January 2020 to 31 December 2023
  2001 WR1 ·   Earth ·   Mars  ·   Sun

2001 WR1 is an

semi-major axis of 1.28 AU). Its orbit has an eccentricity of 0.20 and an inclination of 25° with respect to the ecliptic.[3] The body's observation arc begins with its first observation in February 1953, more than 48 years prior to its official discovery observation at Socorro. The precovery was taken at Palomar Observatory and published by the Digitized Sky Survey.[1]

Close encounters

2001 WR1 has an Earth

lunar distances.[3] In September 1926, it approached Earth to 0.1496 AU (22,400,000 km), its closest approach of all close encounters since 1900. Only in September 2199, it will approach Earth at a similar distance of 0.1514 AU (22,600,000 km).[3]

Hayabusa2 mission

2001 WR1 was proposed as a target of the Hayabusa2 extended mission for a flyby planned to occur on 27 June 2023.[10] When the spacecraft returned to Earth and delivered the sample capsule in December 2020, it was expected to retain 30 kg of xenon propellant, which can be used to extend its service and flyby new targets to explore.[10] However, this asteroid was not selected as a target for Hayabusa2; two other asteroids were selected instead.

Numbering and naming

This

M.P.C. 61443).[11] As of 2021, it has not been named.[1]

Physical characteristics

2001 WR1 has been characterized as a common, stony S-type asteroid.[8]

Rotation period

In March 2018, a rotational

U=3), indicative of a non-spherical shape.[7][a]

Diameter and albedo

According to the survey carried out by the

albedo of 0.34 and measures 0.63 and 0.66 kilometers in diameter, respectively.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 0.818 kilometers based on an absolute magnitude of 17.8.[9]

Notes

  1. ^ a b Lightcurve plot of (172034) 2001 WR1 from Feb/Mar 2018 by Brian D. Warner at the Palmer Divide Observatory (U82). Rotation period 8.0475±0.0003 hours with a brightness amplitude of 0.95±0.03 mag. Quality code is 3. Summary figures at the CS3 and LCDB websites.

References

  1. ^ a b c d e f g "172034 (2001 WR1)". Minor Planet Center. Retrieved 8 September 2021.
  2. ^ "Asteroid (172034) 2001 WR1". Small Bodies Data Ferret. Retrieved 22 September 2018.
  3. ^ a b c d e f "JPL Small-Body Database Browser: 172034 (2001 WR1)" (2021-05-21 last obs.). Jet Propulsion Laboratory. Retrieved 8 September 2021.
  4. ^
    Bibcode:2016PDSS..247.....M
    . Retrieved 22 September 2018.
  5. ^
    S2CID 9341381
    .
  6. ^
    S2CID 119289027
    .
  7. ^
    ISSN 1052-8091. Archived from the original
    (PDF) on 13 April 2019. Retrieved 8 September 2021.
  8. ^
    S2CID 119258489
    .
  9. ^ a b c "LCDB Data for (172034)". Asteroid Lightcurve Database (LCDB). Retrieved 8 September 2021.
  10. ^
    doi:10.1016/j.actaastro.2017.05.016
    .
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 22 September 2018.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=(172034)_2001_WR1&oldid=1198064637"