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1999 XY98

asteroid
Thing asteroid Q15189487

Facts

21 properties
Instance of
asteroid
Follows
1999 XU98[3]
Followed by
1999 XZ98[4]
Absolute magnitude
+15.01[11]
Apoapsis
+2.787784021795949[16]
Argument of periapsis
+104.7538990296176[18]
Discoverer or inventor
Lincoln Near-Earth Asteroid Research[1]
Epoch
November 21, 2025[20]
Longitude of ascending node
+7.914010290595775[14]
Mean anomaly
+341.6306405415446[19]
Minor planet group
asteroid belt[5]
Orbital eccentricity
+0.1648831551973633[10]
Orbital inclination
+2.208661043371955[12]
Orbital period
+1352.27047524342[13]
Parent astronomical body
Sun[6]
Periapsis
+1.998591348742604[17]
Provisional designation
2001 KU27, 1999 XY98[7][8]
Semi-major axis of an orbit
+2.393187685269277[15]
Site of astronomical discovery
Experimental Test Site[2]
Time of discovery or invention
December 7, 1999[9]
Time of periapsis
+2461069.5009512356[21]
🏷️ Also known as
ru 1999 XY98 ru 2001 KU27 zh 小行星75397
🔖 Identifiers · 2
JPL Small-Body Database SPK-ID
20075397
Minor Planet Center body ID
75397

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References

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

Direct Wikidata claims

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

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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). 1999 XY98. Retrieved October 29, 2026, from https://4ort.xyz/entity/q15189487
MLA “1999 XY98.” 4ort.xyz Knowledge Graph, 4ort.xyz, 29 Oct. 2026, https://4ort.xyz/entity/q15189487.
BibTeX @misc{4ortxyz_q15189487_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{1999 XY98}}, year = {2026}, url = {https://4ort.xyz/entity/q15189487}, note = {Accessed: 2026-10-29}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 1999 XY98 — https://4ort.xyz/entity/q15189487 (retrieved 2026-10-29)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 21w ago · LiMrBot bot · 2026-06-05 view diff on Wikidata ↗
    Apoapsis → {'unit': 'Q1811', 'amount': '+2.787784021795949'}
    Provisional designation → 2001 KU27, 1999 XY98
    JPL Small-Body Database SPK-ID → 20075397
    Periapsis → {'unit': 'Q1811', 'amount': '+1.998591348742604'}
    + 21 other properties edited (see Wikidata diff for full list)
    "/* wbremoveclaims-remove:1| */ Absolute magnitude: 15.03"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.