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1311 Knopfia

asteroid
Thing asteroid Q137891

Facts

26 properties
Instance of
asteroid
Follows
1310 Villigera[4]
Followed by
1312 Vassar[5]
Absolute magnitude
+12.4, +12.43[17][18]
Albedo
+0.099[37]
Apoapsis
+2.534, +2.532012679882422[28][29]
Argument of periapsis
+241.66444, +244.4898921782581[32][33]
Diameter
+9.939[36]
Discoverer or inventor
Karl Wilhelm Reinmuth[1]
Epoch
November 21, 2025[38]
Longitude of ascending node
+245.14522, +244.9441466233645[24][25]
Mean anomaly
+325.31346, +228.227238879661[34][35]
Minor planet group
asteroid belt[6]
Named after
Otto Knopf[3]
Orbital eccentricity
0.04 (0.04–0.04, n=3)[14][15][16]
Orbital inclination
+2.83294, +2.833149735200141[19][20]
Orbital period
+3.78, +1380.681410474225[21][22]
Parent astronomical body
Sun[7]
Periapsis
+2.3201425, +2.321170638059197[30][31]
Provisional designation
1929 CG1, 1933 FF1, 1972 RP2, 1976 SD[8][9][10][11]
Rotation period
+19.296[23]
Semi-major axis of an orbit
+2.4270028, +2.426591658970809[26][27]
Significant event
naming[13]
Site of astronomical discovery
Heidelberg-Königstuhl State Observatory[2]
Show all 26 facts +2
Time of discovery or invention
March 24, 1933[12]
Time of periapsis
+2461505.8783380156[39]
🏷️ Also known as
en Knopfia de (1311) Knopfia el 1311 Κνοπφία fa سیارک ۱۳۱۱ ja クノプフィア ru 1976 SD ru Кнопфлия ru 1929 CG1 ru (1311) 1933 FF1 ru (1311) Кнопфлия ru 1933 FF1 ru 1972 RP2 uk 1311 Кнофія zh 小行星1311
🔖 Identifiers · 3
Freebase ID
/m/03y5x_7
JPL Small-Body Database SPK-ID
20001311
Minor Planet Center body ID
1311

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References

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

Direct Wikidata claims

  1. [1] ↑ . Minor Planet Center 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] ↑ . Minor Planet Center database. wikidata.org.
  5. [5] ↑ . Minor Planet Center database. wikidata.org.
  6. [6] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  7. [7] ↑ . 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] ↑ . wikidata.org.
  14. [14] ↑ . 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] ↑ . 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] ↑ . minorplanetcenter.net. minorplanetcenter.net. 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.
  38. [38] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  39. [39] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.

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APA 4ort.xyz Knowledge Graph. (2026). 1311 Knopfia. Retrieved November 1, 2026, from https://4ort.xyz/entity/1311-knopfia
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BibTeX @misc{4ortxyz_1311-knopfia_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{1311 Knopfia}}, year = {2026}, url = {https://4ort.xyz/entity/1311-knopfia}, note = {Accessed: 2026-11-01}}
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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. 5d ago · AbzalM · 2026-10-30 view diff on Wikidata ↗
    Wikipedia languages → ['arz', 'ca', 'ce', 'de', 'el', 'en', 'eo', 'es', 'eu', 'fa', 'fi', 'fr', 'hu',
    Sitelink count → 37
    "/* wbeditentity-update-languages-and-other-short:0||kaa */ kaawiki sitelink"
  2. 15w ago · MatSuBot bot · 2026-07-20 view diff on Wikidata ↗
    Longitude of ascending node → {'unit': 'Q28390', 'amount': '+245.14522'}, {'unit': 'Q28390', 'amount': '+244.9441466233645'}
    Apoapsis → {'unit': 'Q1811', 'amount': '+2.534'}, {'unit': 'Q1811', 'amount': '+2.532012679882422'}
    Mean anomaly → {'unit': 'Q28390', 'amount': '+325.31346'}, {'unit': 'Q28390', 'amount': '+228.227238879661'}
    Epoch → November 21, 2025
    + 27 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update-languages-short:0||ca, kk */ import labels from sitelinks"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.