2024 PT5 explained

Abs Magnitude:27.4
Alt Names:A119q0V
Aphelion: (Q)
Arg Peri: (ω)
Asc Node: (Ω)
Background:
  1. FFC2E0
Rotation:≤ 1h
Discovered:7 August 2024
Eccentricity: (e)
Epoch:2024-Oct-17 (JD 2460600.5)
Inclination: (i)
Jupiter Moid:3.95662AU
Mean Anomaly: (M)
Minorplanet:yes
Moid:0.0060782AU
Observation Arc:78 days
Perihelion: (q)
Semimajor: (a)
Time Periastron:2024-Nov-23.53554
Uncertainty:1

is a near-Earth object roughly 11m (36feet) in diameter discovered by ATLAS South Africa, Sutherland on 7 August 2024, the day before approaching Earth at .

Orbit

The object orbits the Sun but makes slow close approaches to the Earth–Moon system. Between 29 September (19:54 UTC) and 25 November 2024 (16:43 UTC) (a period of)[1] it passed just outside Earth's Hill sphere (roughly 0.01abbr=unitNaNabbr=unit) at a low relative velocity (in the range 0.002km/s – 0.439abbr=onNaNabbr=on) and will become temporarily captured by Earth's gravity, with a geocentric orbital eccentricity of less than 1 and negative geocentric orbital energy. The most recent closest approach to Earth was 8 August 2024 at roughly when it had a relative velocity of 1.37km/s.

On 18 August 2024 CNEOS removed from their Sentry Risk Table, having determined it poses no risk of a potential Earth impact.[2]

The object is expected to make another approach in 2025 and 2055.[3] This object will possibly return to orbit around Earth around 8 May 2084.[4]

Entering and Exiting Geocentric Orbit! Epoch! Earth distance! Geocentric
eccentricity! Apogee! Orbital period
2024-Sep-290.023abbr=unitNaNabbr=unit 1.016

infty

infty

2024-Sep-30 0.0232abbr=unitNaNabbr=unit 0.997 2.9AU 36468NaN
2024-Oct-24 0.0268abbr=unitNaNabbr=unit 0.614 0.028AU 493NaN
2024-Nov-25 0.0238abbr=unitNaNabbr=unit 0.983 0.72AU 46473NaN
2024-Nov-26 0.0236abbr=unitNaNabbr=unit 1.009

infty

infty

Physical properties

Its reflectance spectrum in the range NaNnm obtained with LDT/IRTF is inconsistent with artificial objects and asteroids, its surface is quite red, well matched by samples of the Moon, both Maria and Highlands. However, its visible spectrum obtained with GTC is consistent with that of an Sv-type asteroid or perhaps lunar ejecta.[5] Its color indices and the spectrum obtained with Gemini North best matches lunar rock samples followed by S-complex asteroids. Its rotation period is 1 hour or less.

See also

References

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Notes and References

  1. https://phys.org/news/2024-09-earth-capture-moon-weekend-nasa.html Earth to capture a 'second moon' this weekend, NASA says
  2. Web site: Sentry: Earth Impact Monitoring . JPL/CNEOS.
  3. Web site: DUNN . MARCIA . Earth's 'mini moon' may have been a chunk of our actual moon . . 25 November 2024.
  4. Web site: Robert Lea . 2024-11-26 . Earth's mini-moon has finally departed. Will it ever return as a 'second moon?' . 2024-12-01 . Space.com . en.
  5. Web site: Robert Lea . 2024-11-22 . Earth's 'second moon' is just visiting its cosmic parents for Thanksgiving . 2024-12-01 . Space.com . en.