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(22304) 1990 RU9

minor planet
Place Asteroid Q4542309

Facts

23 properties

Identity

Instance of
asteroid
More facts +22
Follows
(22303) 1990 QE4[3]
Followed by
(22305) 1990 SD2[4]
Absolute magnitude
+14.0, +14.06[13][14]
Albedo
+0.301[32]
Apoapsis
+3.023, +3.024897464269045[23][24]
Argument of periapsis
+153.91953, +154.6049046935985[27][28]
Diameter
+4.283[31]
Discoverer or inventor
Henry E. Holt[1]
Epoch
November 21, 2025[33]
Longitude of ascending node
+150.26809, +150.0312573975901[19][20]
Mean anomaly
+273.26049, +224.9399211450344[29][30]
Minor planet group
asteroid belt[5]
Orbital eccentricity
0.18 (0.18–0.18, n=3)[10][11][12]
Orbital inclination
+10.98703, +10.9979431081127[15][16]
Orbital period
+4.1, +1497.760137748747[17][18]
Parent astronomical body
Sun[6]
Periapsis
+2.1041978, +2.098907101005871[25][26]
Provisional designation
1990 PH, 1990 RU9[7][8]
Semi-major axis of an orbit
+2.5636113, +2.561902282637458[21][22]
Site of astronomical discovery
Palomar Observatory[2]
Time of discovery or invention
September 14, 1990[9]
Time of periapsis
+2461562.410006417[34]
🏷️ Also known as
en (22304) 1990 RU9 ru 1990 PH ru 1990 RU9 zh 小行星22304
🔖 Identifiers · 4
Freebase ID
/m/0h548k2
JPL Small-Body Database SPK-ID
20022304
Minor Planet Center body ID
22304
Wolfram Language entity code
Entity["MinorPlanet", "MinorPlanet22304Provisional1990RU9"]

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections
Discoverer or inventor 1
Henry E. Holt
Epoch 1
November 21, 2025
Followed by 1
(22305) 1990 SD2
Followed by (predecessor) 1
(22305) 1990 SD2
Follows 1
(22303) 1990 QE4
Instance of 1
asteroid
Minor planet group 1
asteroid belt
Parent astronomical body 1
Sun
Preceded by (successor) 1
(22303) 1990 QE4
Site of astronomical discovery 1
Palomar Observatory
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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] ↑ . wikidata.org.
  11. [11] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  12. [12] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  13. [13] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  14. [14] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [15] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  16. [16] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  17. [17] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  18. [18] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [19] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  20. [20] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [21] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  22. [22] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [23] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  24. [24] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  25. [25] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  26. [26] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  27. [27] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  28. [28] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  29. [29] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  30. [30] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  31. [31] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  32. [32] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  33. [33] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  34. [34] ↑ . 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). (22304) 1990 RU9. Retrieved November 3, 2026, from https://4ort.xyz/entity/22304-1990-ru9
MLA “(22304) 1990 RU9.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 Nov. 2026, https://4ort.xyz/entity/22304-1990-ru9.
BibTeX @misc{4ortxyz_22304-1990-ru9_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(22304) 1990 RU9}}, year = {2026}, url = {https://4ort.xyz/entity/22304-1990-ru9}, note = {Accessed: 2026-11-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (22304) 1990 RU9 — https://4ort.xyz/entity/22304-1990-ru9 (retrieved 2026-11-03)

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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. 27w ago · Shuaib-bot bot · 2026-05-04 view diff on Wikidata ↗
    Orbital period → 4.1 year, 1,497.760138 day
    Argument of periapsis → 153.91953 degree, 154.604905 degree
    Mean anomaly → 273.26049 degree, 224.939921 degree
    Epoch → November 21, 2025
    + 17 other properties edited (see Wikidata diff for full list)
    "Changed the item"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.