(175706) 1996 FG3

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(175706) 1996 FG3
V–I = 0.714±0.004[8]
17.76[7][8][10][11][14][16]
17.833±0.024[9]
18.4[1][2]

(175706) 1996 FG3 is a carbonaceous

Apollo group, approximately 1.7 kilometers (1.1 miles) in diameter. The primary has a spheroidal shape. Its minor-planet moon
measures approximately 490 meters (1,600 feet) in diameter.

It was discovered on 24 March 1996, by Australian astronomer

Robert McNaught at Siding Spring Observatory in New South Wales, Australia.[1] The asteroid was a target of NASA's Janus Serenity space probe,[17] until the delay of the rocket launch made the target inaccessible.[18] In 2017, scientists from the Chinese Academy of Sciences' Purple Mountain Observatory revealed a plan to land a probe on this asteroid in 2029, as part of an asteroid exploration mission.[19]

Numbering and naming

This

numbered by the Minor Planet Center on 21 February 2008.[20] As of 2021, it has not been named.[1]

Orbit and classification

1996 FG3 orbits the Sun at a distance of 0.7–1.4 

lunar distances.[2] In 2019 a precovery observation from Palomar Mountain was found, extending the body's observation arc into 1985.[1]

Physical characteristics

The carbonaceous body is characterized as a rare B-type and hydrated C-type (Ch) asteroid, respectively.[11][15]

Lightcurves

Several rotational

oblate ellipsoid with a nearly spherical shape.[6][22]

Diameter and albedo

According to numerous observations, including the EXPLORENEOs survey, NASA's

albedo of 0.03 to 0.05.[6][7][8][9][10][11] The Collaborative Asteroid Lightcurve Link adopts an albedo of 0.04 and a diameter of 1.90 kilometers.[14]

Satellite

See also:
Asteroid moon

During the photometric observations in December 1998, the

asteroid moon is known by its provisional designation S/1998 (175706) 1. It has a diameter of approximately 490 meters,[5] an orbital period of 16.1508 hours, and a nearly circular orbit, with an eccentricity of 0.1 and a semi-major axis of approximately 3.4 primary radii.[11]
: 2  The orbital period was later estimated to be around 16.15 hours.

Exploration

Rejected Marco Polo mission

Due to its binary nature and its low

MarcoPolo-R, which was the Marco Polo spacecraft's first proposed mission. MarcoPolo-R was originally selected for the assessment study phase in the M3 slot of ESA's Cosmic Vision program, but rejected in favor of PLATO by the end of 2012.[6][22]

Janus spacecraft

Main article: Janus (spacecraft)

The asteroid was a planned target of NASA's Janus Serenity space probe, which was scheduled to launch in 2022 alongside NASA's Psyche spacecraft, and to arrive at 1996 FG3 in 2026.[17] 1996 FG3 became impossible to reach for Janus when the launch of Psyche was delayed.[18]

Planned Chinese mission

In 2017, Chinese scientists announced they plan to land a probe on 1996 FG3 after 2029 as part of its asteroid exploration mission.[19] The mission includes plans for fly-by of three asteroids (one of them is 99942 Apophis), and land on 1996 FG3 to conduct in situ sampling analysis on the surface, according to Ji Jianghui, a researcher at the Purple Mountain Observatory of the Chinese Academy of Sciences and a member of the expert committee for scientific goal argumentation of deep space exploration in China. The probe is also expected to conduct a fly-by of a third asteroid to be determined at a later time. The entire mission is expected to take about six years.[19]

See also

  • (35107) 1991 VH, binary near-Earth asteroid and former target of the Janus Mayhem mission, until the launch delay made the target inaccessible

References

  1. ^ a b c d e f "175706 (1996 FG3)". Minor Planet Center. Retrieved 14 December 2016.
  2. ^ a b c d e f "JPL Small-Body Database Browser: 175706 (1996 FG3)" (2014-03-10 last obs.). Jet Propulsion Laboratory. Retrieved 12 December 2018.
  3. ^ a b "Central Bureau for Astronomical Telegrams – Circular No. 7069". IAU – International Astronomical Union. 18 December 1998. Retrieved 14 December 2016.
  4. ^ a b c "Central Bureau for Astronomical Telegrams – Circular No. 7074". IAU – International Astronomical Union. 26 December 1998. Retrieved 14 December 2016.
  5. ^ a b Johnston, Robert (16 November 2014). "(175706) 1996 FG3". johnstonsarchive.net. Retrieved 14 December 2016.
  6. ^
    S2CID 119248574
    .
  7. ^
    S2CID 41459166
    .
  8. ^
    doi:10.1006/icar.2000.6375
    .
  9. ^
    doi:10.1111/j.1365-2966.2011.19575.x
    .
  10. ^
    doi:10.1088/0004-6256/141/4/109
    .
  11. ^
    S2CID 62800879
    .
  12. ^
    doi:10.1016/j.icarus.2005.10.014
    .
  13. doi:10.1088/0004-6256/142/3/85
    .
  14. ^ a b c "LCDB Data for (175706)". Asteroid Lightcurve Database (LCDB). Retrieved 14 December 2016.
  15. ^
    S2CID 119278697
    .
  16. doi:10.1016/j.icarus.2012.07.026
    .
  17. ^ a b New SIMPLEx Mission to Send SmallSats on Longest Deep Space Journey to Date at NASA
  18. ^ a b Foust, Jeff (9 June 2022). "Psyche launch delay forcing revamp of rideshare mission". spacenews.com. Retrieved 11 June 2022.
  19. ^ a b c Yu Fei (7 March 2017). "Riding an asteroid: China's next space goal". Xinhua News. Retrieved 1 May 2017.
  20. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.
  21. doi:10.1006/icar.2000.6421
    .
  22. ^
    doi:10.1051/0004-6361/201117041
    . Retrieved 14 December 2016.

External links

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