2022 NX1

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2022 NX1
Discovery[1]
Discovered byMoonbase South Observatory
Discovery date2 July 2022
Designations
2022 NX1
xkos033
Orbital characteristics[5]
Epoch 2022-Aug-09 (JD 2459800.5)
Uncertainty parameter 2
Observation arc31 days
Aphelion1.0258 AU (Q)
Perihelion0.98646 AU (q)
1.0062 AU (a)
Eccentricity0.019599 (e)
(Geocentric hyperbolic e=1.1)[3]
1.00929 years
207.80° (M)
Inclination1.1382° (i)
286.06° (Ω)
2022-Dec-14 @ 0.9957 AU[4]
182.68° (ω)
Earth MOID0.0045 AU (670,000 km; 1.8 LD)
Jupiter MOID3.9 AU (580,000,000 km)
Physical characteristics
Dimensions
  • ~9 m (30 ft)[2]
  • 7–14 meters
28.07[6]

2022 NX1 is a near-Earth object roughly 10 meters (33 ft) in diameter, that orbits the Sun but makes slow close approaches to the Earth–Moon system. Between 11 June 2022 and 3 July 2022 (a period of 22 days) it passed within Earth's Hill sphere (roughly 0.01 AU (1.5 million km; 0.93 million mi)) at a low relative velocity and became temporarily captured by Earth's gravity, with a geocentric orbital eccentricity of less than 1[7] and negative geocentric orbital energy.[8] Due to its Earth-like orbit, the object could be of artificial origin or lunar ejecta.[1] The closest approach to Earth in 2022 was 26 June 2022 at roughly 812,200 km (504,700 mi) when it had a relative velocity of 0.96 km/s (2,100 mph).[5] It was last near Earth around 16 January 1981 when it passed about 600,000 km (370,000 mi) from Earth.[5] It will return to be temporarily captured in December 2051.[8]

Entering and Exiting Geocentric Orbit
(assuming the Earth+Asteroid are the only objects in the Solar System)
Epoch Earth distance[9] Geocentric
eccentricity[7] 		Apogee[7] Orbital period[7]
2022-Jun-11 0.0077 AU (1.15 million km) 1.024
2022-Jun-12 0.0075 AU (1.12 million km) 0.997 3.6 AU (540 million km) 1,395.02 years (509,532 d)
2022-Jun-21 0.0058 AU (0.87 million km) 0.815 0.054 AU (8.1 million km) 2.92 years (1,067 d)
2022-Jul-02 0.0058 AU (0.87 million km) 0.987 0.82 AU (123 million km) 154.59 years (56,465 d)
2022-Jul-03 0.0059 AU (0.88 million km) 1.008

The object was discovered on 2 July 2022 by Moonbase South Observatory in Namibia when it had a deep Southern Hemisphere declination of –59° in the constellation of Pavo.[1]

With a 56-day observation arc the object shows a 1.2% chance of impacting Earth between the years of 2075–2122.[2] This asteroid experienced a temporarily-captured flyby in 1981, had another one in 2022, and the 31-day observation arc predicts it may become a temporarily-captured orbiter in 2051.[8]

See also

  • 1991 VG – near-Earth asteroid temporarily captured by Earth after its discovery in 1991
  • 2006 RH120 – the first temporary Earth satellite discovered in situ 2006
  • 2020 CD3 – another temporary Earth satellite discovered in 2020
  • 2020 SO – a suspected near-Earth object identified as a rocket booster from the Surveyor 2 mission

References

  1. ^ a b c d "MPEC 2022-O04 : 2022 NX1". IAU Minor Planet Center. 17 July 2022. Retrieved 18 July 2022. (K22N01X)
  2. ^ a b c "Earth Impact Risk Summary: 2022 NX1". NASA/JPL Near-Earth Object Program Office. Archived from the original on 27 July 2022. Retrieved 27 July 2022.
  3. ^ "JPL Horizons On-Line Ephemeris for 2022 NX1 orbit of Earth (geocentric) at epoch 2022-Aug-09". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 21 August 2022. Geocentric solution. Ephemeris Type: Orbital Elements / Center: @399 / Time Span: 2022-Aug-09 (to match infobox epoch)
  4. ^ "Horizons Batch for perihelion on 2022-Dec-14". JPL Horizons. Retrieved 18 July 2022.
  5. ^ a b c "JPL Small-Body Database Browser: (2022 NX1)" (last observation: 2022-08-02; arc: 31 days (167 obs)). Jet Propulsion Laboratory. Archived from the original on 18 July 2022. Retrieved 18 July 2022.
  6. ^ "2022 NX1 Orbit". Minor Planet Center. Archived from the original on 19 July 2022. Retrieved 18 July 2022.
  7. ^ a b c d "JPL Horizons On-Line Ephemeris for 2022 NX1 orbit of Earth (geocentric) for June – July 2022". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Archived from the original on 18 July 2022. Retrieved 18 July 2022. Geocentric solution. Ephemeris Type: Orbital Elements / Center: @399
  8. ^ a b c de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (12 August 2022). "How to Become a Mini-moon: Some Hints from 2022 NX1". Research Notes of the AAS. 6 (8): 160. Bibcode:2022RNAAS...6..160D. doi:10.3847/2515-5172/ac8809.
  9. ^ "Horizons Batch for June – July 2022 Geocentric distance" (Escaping Earth's Hill Sphere @ ~0.01au). JPL Horizons. Archived from the original on 18 July 2022. Retrieved 18 July 2022. (JPL#2/Soln.date: 2022-Jul-18)

External links

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