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7820 IanLyon

Asteroid named after Professor Ian Lyon, The University of Manchester in recognition of his lifetime career researching this area of science. IanLyon is a very faint object typically of around 16-18 magnitude.
Place Asteroid Q7902674

Facts

25 properties

Identity

Instance of
asteroid
More facts +24
Follows
(7819) 1990 RR3[3]
Followed by
(7821) 1991 AC[4]
Absolute magnitude
+14.3, +14.52[15][16]
Albedo
+0.340[35]
Apoapsis
+2.924, +2.92415668846596[26][27]
Argument of periapsis
+322.40170, +322.4105561869843[30][31]
Diameter
+3.292[34]
Discoverer or inventor
Antonín Mrkos[1]
Epoch
November 21, 2025[36]
Longitude of ascending node
+8.69641, +8.574167776948272[22][23]
Mean anomaly
+215.06359, +250.5391985129317[32][33]
Minor planet group
asteroid belt[5]
Orbital eccentricity
0.23 (0.23–0.23, n=3)[12][13][14]
Orbital inclination
+2.29954, +2.296032467528258[17][18]
Orbital period
+3.65, +1333.527395828992[19][20]
Parent astronomical body
Sun[6]
Periapsis
+1.8189339, +1.817888329282114[28][29]
Provisional designation
1990 TU8, 1979 SP7, 1979 TB1[7][8][9]
Rotation period
+4.1[21]
Semi-major axis of an orbit
+2.3715144, +2.371022508874037[24][25]
Significant event
naming[11]
Site of astronomical discovery
Kleť Observatory[2]
Time of discovery or invention
October 14, 1990[10]
Time of periapsis
+2461405.96938209[37]
🏷️ Also known as
en (7820) 1990 TU8 en 7820 IanLyon en IanLyon de (7820) 1990 TU8 de (7820) IanLyon es (7820) 1990 TU8 fr (7820) 1990 TU8 it (7820) 1990 TU8 pt (7820) 1990 TU8 ru 1979 SP7 ru 1979 TB1 ru 1990 TU8 zh 小行星7820
🔖 Identifiers · 3
Freebase ID
/m/0g51b2s
JPL Small-Body Database SPK-ID
20007820
Minor Planet Center body ID
7820

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

🔗 Connections
Discoverer or inventor 1
Antonín Mrkos
Epoch 1
November 21, 2025
Followed by 1
(7821) 1991 AC
Followed by (predecessor) 1
(7821) 1991 AC
Follows 1
(7819) 1990 RR3
Instance of 1
asteroid
Minor planet group 1
asteroid belt
Parent astronomical body 1
Sun
Preceded by (successor) 1
(7819) 1990 RR3
Site of astronomical discovery 1
Kleť 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] ↑ . Minor Planet Center database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  8. [8] ↑ . Minor Planet Center database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  9. [9] ↑ . Minor Planet Center 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] ↑ . wikidata.org.
  12. [12] ↑ . 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] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  22. [22] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  23. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  24. [24] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  25. [25] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  26. [26] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  27. [27] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  28. [28] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  29. [29] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  30. [30] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  31. [31] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  32. [32] ↑ . minorplanetcenter.net. minorplanetcenter.net. 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.
  35. [35] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  36. [36] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  37. [37] ↑ . 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). 7820 IanLyon. Retrieved November 9, 2026, from https://4ort.xyz/entity/7820-ianlyon
MLA “7820 IanLyon.” 4ort.xyz Knowledge Graph, 4ort.xyz, 9 Nov. 2026, https://4ort.xyz/entity/7820-ianlyon.
BibTeX @misc{4ortxyz_7820-ianlyon_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{7820 IanLyon}}, year = {2026}, url = {https://4ort.xyz/entity/7820-ianlyon}, note = {Accessed: 2026-11-09}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 7820 IanLyon — https://4ort.xyz/entity/7820-ianlyon (retrieved 2026-11-09)

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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. 9d ago · AbzalM · 2026-11-02 view diff on Wikidata ↗
    "Changed [kaa] labels, descriptions, aliases and claims: kaawiki sitelink"
  2. 26w ago · KaleemBot bot · 2026-05-12 view diff on Wikidata ↗
    Significant event → naming
    Orbital eccentricity → 0.23, 0.233008, 0.233289
    Parent astronomical body → Sun
    Minor planet group → asteroid belt
    + 19 other properties edited (see Wikidata diff for full list)
    "Changed the item: Added ur:7820 ایان لیون"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.