2020 PP1

2020 PP1 is a sub-kilometer asteroid, classified as a near-Earth object of the Apollo group, that is a temporary quasi-satellite of the Earth. There are over a dozen known Earth quasi-satellites, some of which switch periodically between the quasi-satellite and horseshoe co-orbital states.[6]

2020 PP1
Discovery
Discovered byPan-STARRS
Discovery siteHaleakalā Observatory
Discovery date12 August 2020
Designations
Designation
2020 PP1
Orbital characteristics[2][3][4]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 5
Observation arc6 days
Aphelion1.07568 AU
Perihelion0.92775 AU
1.001715 AU
Eccentricity0.07384
1.00 y (366.197 d)
56.64°
Inclination5.827°
141.0248°
44.14°
Earth MOID0.0325382 AU
Physical characteristics
Dimensions9–22 m[a][5]
26.9[2]

    Discovery

    2020 PP1 was discovered on 12 August 2020 by J. Bulger, T. Lowe, A. Schultz, and M. Willman observing for the Pan-STARRS Survey.[7] As of 20 January 2021, it has been observed 34 times with an observation arc of 6 days.[2]

    Orbit and orbital evolution

    2020 PP1 is currently an Apollo asteroid (Earth-crossing but with a period longer than a year). Its semi-major axis (currently 1.001715 AU) is similar to that of Earth (0.999789 AU), but it has both low eccentricity (0.07384) and low orbital inclination (5.827°). It alternates between being an Aten asteroid and being an Apollo asteroid, although its orbital evolution is not fully stable and it can be considered as a temporary quasi-satellite of the Earth; its orbital evolution is akin to that of 469219 Kamoʻoalewa.[6]

    Physical properties

    With an absolute magnitude of 26.9 mag, it has a diameter in the range 9–22 meters (for an assumed albedo range of 0.04–0.20, respectively).

    See also

    Notes
    • ^ This is assuming an albedo of 0.20–0.04.

    References
    1. List Of Apollo Minor Planets
    2. 2020 PP1 at the JPL Small-Body Database
    3. AstDys-2 on 2020 PP1 Retrieved 2021-01-20
    4. NEODyS-2 on 2020 PP1 Retrieved 2021-01-20
    5. Absolute-magnitude conversion table (H)
    6. de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (March 2021). "Using Mars co-orbitals to estimate the importance of rotation-induced YORP break-up events in Earth co-orbital space". Monthly Notices of the Royal Astronomical Society. 501 (4): 6007–6025. arXiv:2101.02563. Bibcode:2021MNRAS.501.6007D. doi:10.1093/mnras/stab062.
    7. Discovery MPEC

    Further reading
    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.