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(28424) 1999 XA

asteroid
Place Asteroid Q6585852

Facts

23 properties

Identity

Instance of
asteroid
More facts +22
Follows
(28423) 1999 WN3[4]
Followed by
28425 Sungkanit[5]
Absolute magnitude
14.4 (14.2–14.4, n=3)[15][16][17]
Albedo
0.088
Apoapsis
3.014 astronomical unit, 3.01358720362925 astronomical unit
Argument of periapsis
345.95405 degree, 345.8658773486478 degree
Diameter
6.471 km
Discoverer or inventor
Lincoln Near-Earth Asteroid Research[2]
Epoch
November 21, 2025
Longitude of ascending node
36.54484 degree, 36.50297633753972 degree[22][23]
Mean anomaly
51.93341 degree, 320.7494424964357 degree
Minor planet group
asteroid belt[6]
Orbital eccentricity
0.25 (0.25–0.25, n=3)[12][13][14]
Orbital inclination
11.93109 degree, 11.93189776570777 degree[18][19]
Orbital period
3.76 year, 1,374.661675108493 day[20][21]
Parent astronomical body
Sun[7]
Periapsis
1.8242838 astronomical unit, 1.825479340942597 astronomical unit
Provisional designation
1998 KE42, 1999 SO8, 1999 XA[8][9][10]
Semi-major axis of an orbit
2.4192353 astronomical unit, 2.419533272285924 astronomical unit[24]
Site of astronomical discovery
Experimental Test Site[3]
Time of discovery or invention
December 1, 1999[11]
Time of periapsis
2,461,150.3784364634 Julian day
🏷️ Also known as
en (28424) 1999 XA ru 1998 KE42 ru 1999 SO8 ru 1999 XA zh 小行星28424
🔖 Identifiers · 4
Google Knowledge Graph ID
/g/11gk_2wjc5
JPL Small-Body Database SPK-ID
20028424
Minor Planet Center body ID
28424
Wolfram Language entity code
Entity["MinorPlanet", "MinorPlanet28424Provisional1999XA"]

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Summary

(28424) 1999 XA is an asteroid[1].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  2. [3] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  8. [9] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  9. [10] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  10. [11] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  11. [12] ↑ . wikidata.org.
  12. [13] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  13. [14] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  14. [15] ↑ . wikidata.org.
  15. [16] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  16. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  17. [18] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  18. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [20] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  20. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [22] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  22. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [24] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). (28424) 1999 XA. Retrieved November 9, 2026, from https://4ort.xyz/entity/-28424-1999-xa
MLA “(28424) 1999 XA.” 4ort.xyz Knowledge Graph, 4ort.xyz, 9 Nov. 2026, https://4ort.xyz/entity/-28424-1999-xa.
BibTeX @misc{4ortxyz_-28424-1999-xa_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(28424) 1999 XA}}, year = {2026}, url = {https://4ort.xyz/entity/-28424-1999-xa}, note = {Accessed: 2026-11-09}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (28424) 1999 XA — https://4ort.xyz/entity/-28424-1999-xa (retrieved 2026-11-09)

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