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1999 GT21

asteroid
Thing asteroid Q15193900

Facts

23 properties
Instance of
asteroid
Follows
1999 GN16[3]
Followed by
1999 GQ32[4]
Absolute magnitude
+14.23[10]
Albedo
+0.035[20]
Apoapsis
+3.44442426175689[15]
Argument of periapsis
+146.5249772770942[17]
Diameter
+9.2[19]
Discoverer or inventor
Lincoln Near-Earth Asteroid Research[1]
Epoch
June 9, 2026[21]
Longitude of ascending node
+76.31248584615031[13]
Mean anomaly
+22.59025636158307[18]
Minor planet group
asteroid belt[5]
Orbital eccentricity
+0.1303104107139739[9]
Orbital inclination
+11.22525101490387[11]
Orbital period
+1943.017869865451[12]
Parent astronomical body
Sun[6]
Periapsis
+2.650227665904607[16]
Provisional designation
1999 GT21[7]
Semi-major axis of an orbit
+3.047325963830748[14]
Site of astronomical discovery
Experimental Test Site[2]
Time of discovery or invention
April 15, 1999[8]
Time of periapsis
+2461078.574245013[22]
🏷️ Also known as
ru 1999 GT21 zh 小行星80015
🔖 Identifiers · 2
JPL Small-Body Database SPK-ID
20080015
Minor Planet Center body ID
80015

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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.
  22. [22] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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). 1999 GT21. Retrieved October 29, 2026, from https://4ort.xyz/entity/q15193900
MLA “1999 GT21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 29 Oct. 2026, https://4ort.xyz/entity/q15193900.
BibTeX @misc{4ortxyz_q15193900_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{1999 GT21}}, year = {2026}, url = {https://4ort.xyz/entity/q15193900}, note = {Accessed: 2026-10-29}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 1999 GT21 — https://4ort.xyz/entity/q15193900 (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 · 2026-06-10 view diff on Wikidata ↗
    Provisional designation → 1999 GT21
    Follows → 1999 GN16
    Periapsis → {'unit': 'Q1811', 'amount': '+2.650227665904607'}
    Parent astronomical body → Sun
    + 22 other properties edited (see Wikidata diff for full list)
    "/* wbremoveclaims-remove:1| */ Absolute magnitude: 14.27"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.