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2022 NX1

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2022 NX1
Discovery[1]
Discovered byMoonbase South Observatory
Discovery date2 July 2022
Designations
2022 NX1
xkos033
Orbital characteristics[3]
Epoch2023-Feb-25 (JD2460000.5)
Uncertainty parameter1
Observation arc142 days
Aphelion1.04749104AU(Q)
Perihelion0.99635808AU(q)
1.02192456AU(a)
Eccentricity0.02501797(e)
(Geocentrichyperbolice=1.1)[4]
1.03308595years
65.0876°(M)
Inclination1.066697°(i)
274.76734°(Ω)
2022-Dec-18.7784[5]
169.58306°(ω)
EarthMOID0.0120258 AU (1,799,030 km; 4.6801 LD)
JupiterMOID3.93788 AU (589,098,000 km)
Physical characteristics
Dimensions
  • ~9 m (30 ft)[2]
  • 7–14 meters
28.1[6]

2022 NX1is anear-Earth objectroughly 10 meters (33 ft) in diameter discovered by Grzegorz Duszanowicz and Jordi Camarasa. The object 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'sHill sphere(roughly 0.01 AU (1.5 million km; 0.93 million mi)) at a low relative velocity and becametemporarily capturedby Earth's gravity, with a geocentricorbital eccentricityof less than 1[7]and negative geocentric orbital energy.[8]Due to its Earth-like orbit, the object might be of artificial origin or lunar ejecta.[1]However, visible spectroscopy obtained with theGran Telescopio Canariasshows that it is an asteroid.[9]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).[3]It was last near Earth around 16 January 1981 when it passed about 600,000 km (370,000 mi) from Earth.[3]It will return as atemporary satellitein December 2051.[8][9]

Entering and Exiting Geocentric Orbit
(assuming the Earth+Asteroid are the only objects in the Solar System)
Epoch Earth distance[10] Geocentric
eccentricity[7] 		Apogee[7] Orbital period[7]
2022-Jun-11 0.0077AU(1.15 millionkm) 1.024
2022-Jun-12 0.0075AU(1.12 millionkm) 0.997 3.6 AU (540 million km) 1,395.02 years (509,532 d)
2022-Jun-21 0.0058AU(0.87 millionkm) 0.815 0.054 AU (8.1 million km) 2.92 years (1,067 d)
2022-Jul-02 0.0058AU(0.87 millionkm) 0.987 0.82 AU (123 million km) 154.59 years (56,465 d)
2022-Jul-03 0.0059AU(0.88 millionkm) 1.008

The object was discovered on 2 July 2022 by Moonbase South Observatory inNamibiawhen it had a deepSouthern Hemispheredeclinationof –59° in theconstellationofPavo.[1]

With a 56-dayobservation arcthe object shows a 1.2% chance ofimpactingEarth between the years of 2075–2122.[2]This asteroid experienced a temporarily-captured flyby in 1981, had another one in 2022, and the current observation arc predicts it will become a mini-moon again in 2051.[8][9]

Thereflectance spectrumof 2022 NX1suggests that its origin is not artificial and also that it is not lunar ejecta;[9]it is also different from theV typeof the only other mini-moon with available spectroscopy,2020 CD3.The visible spectrum of 2022 NX1is consistent with that of aK-type asteroid,although it could also be classified as anXk type.[9]Considering typical values of the similar albedo of both K-type and Xk-type asteroids and its absolute magnitude, 2022 NX1may have a size range of 5 to 15 m.[9]

See also

[edit]
  • 1991 VG– near-Earth asteroid temporarily captured by Earth after its discovery in 1991
  • 2006 RH120– the first temporary Earth satellite discoveredin situ2006
  • 2020 CD3– another temporary Earth satellite discovered in 2020
  • 2024 PT5– another temporary Earth satellite discovered in 2024
  • 2020 SO– a suspected near-Earth object identified as arocket boosterfrom theSurveyor 2mission

References

[edit]
  1. ^abcd"MPEC 2022-O04: 2022 NX1".IAU Minor Planet Center. 17 July 2022.Retrieved18 July2022.(K22N01X)
  2. ^abc"Earth Impact Risk Summary: 2022 NX1".NASA/JPL Near-Earth Object Program Office.Archivedfrom the original on 27 July 2022.Retrieved27 July2022.
  3. ^abc"JPL Small-Body Database Browser: (2022 NX1)"(last observation: 2022-08-02;arc:31 days (167 obs)).Jet Propulsion Laboratory.Archivedfrom the original on 18 July 2022.Retrieved18 July2022.
  4. ^"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.Retrieved21 August2022.Geocentric solution. Ephemeris Type: Orbital Elements / Center: @399 / Time Span: 2022-Aug-09 (to match infobox epoch)
  5. ^"Horizons Batch for perihelion on 2022-Dec-14".JPL Horizons.Retrieved18 July2022.
  6. ^"2022 NX1 Orbit".Minor Planet Center.Archivedfrom the original on 19 July 2022.Retrieved18 July2022.
  7. ^abcd"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.Archivedfrom the original on 18 July 2022.Retrieved18 July2022.Geocentric solution. Ephemeris Type: Orbital Elements / Center: @399
  8. ^abcde 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.S2CID251538919.
  9. ^abcdefde la Fuente Marcos, Raúl; de León, Julia; de la Fuente Marcos, Carlos; Licandro, Javier; Serra-Ricart, Miquel; Cabrera-Lavers, Antonio (2 February 2023)."Mini-moons from horseshoes: A physical characterization of 2022 NX1with OSIRIS at the 10.4 m Gran Telescopio Canarias ".Astronomy & Astrophysics Letters.670(1): L10 (8 pages).arXiv:2301.10797.Bibcode:2023A&A...670L..10D.doi:10.1051/0004-6361/202245514.
  10. ^"Horizons Batch for June – July 2022 Geocentric distance"(Escaping Earth's Hill Sphere @ ~0.01au).JPL Horizons.Archivedfrom the original on 18 July 2022.Retrieved18 July2022.(JPL#2/Soln.date: 2022-Jul-18)
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