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12975 Efremov

asteroid
Asteroid Q2624279

Facts

25 properties

Identity

Instance of
asteroid
More facts +24
Follows
12974 Halitherses[4]
Followed by
12976 Kalinenkov[5]
Absolute magnitude
+13.2, +13.37[16][17]
Albedo
+0.169[35]
Apoapsis
+2.952, +2.954499723601315[26][27]
Argument of periapsis
+217.49949, +217.0039460892993[30][31]
Diameter
+6.749[34]
Discoverer or inventor
Nikolai Chernykh[1]
Epoch
November 21, 2025[36]
Longitude of ascending node
+186.29826, +186.2558789781307[22][23]
Mean anomaly
+309.42579, +158.3981098396943[32][33]
Minor planet group
asteroid belt[6]
Named after
Juri Nikolajewitsch Jefremow[3]
Orbital eccentricity
0.14 (0.14–0.14, n=3)[13][14][15]
Orbital inclination
+15.13323, +15.1296225208365[18][19]
Orbital period
+4.16, +1519.530562821215[20][21]
Parent astronomical body
Sun[7]
Periapsis
+2.2216469, +2.218836094851957[28][29]
Provisional designation
1973 SY5, 1977 RH4, 1998 RM59[8][9][10]
Semi-major axis of an orbit
+2.5870251, +2.586667909226636[24][25]
Significant event
naming[12]
Site of astronomical discovery
Crimean Astrophysical Observatory[2]
Time of discovery or invention
September 28, 1973[11]
Time of periapsis
+2460331.9145305706[37]
🏷️ Also known as
en 12975 Efremov en Efremov de (12975) Efremov fa سیارک 12975 fa سیارک ۱۲۹۷۵ ru 1973 SY5 ru (12975) 1973 SY5 ru 1977 RH4 ru 1998 RM59 ru Efremov uk 12975 Efremov uk 12975 Єфремов zh 小行星12975
🔖 Identifiers · 3
Freebase ID
/m/03y1jkd
JPL Small-Body Database SPK-ID
20012975
Minor Planet Center body ID
12975

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

🔗 Connections
Discoverer or inventor 1
Nikolai Chernykh
Epoch 1
November 21, 2025
Followed by 1
12976 Kalinenkov
Followed by (predecessor) 1
12976 Kalinenkov
Follows 1
12974 Halitherses
Instance of 1
asteroid
Minor planet group 1
asteroid belt
Parent astronomical body 1
Sun
Preceded by (successor) 1
12974 Halitherses
Site of astronomical discovery 1
Crimean Astrophysical Observatory
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Related Entities

Nikolai Chernykh

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] ↑ . wikidata.org.
  13. [13] ↑ . wikidata.org.
  14. [14] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  15. [15] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  16. [16] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  17. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  18. [18] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  19. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  20. [20] ↑ . minorplanetcenter.net. minorplanetcenter.net. 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). 12975 Efremov. Retrieved November 10, 2026, from https://4ort.xyz/entity/12975-efremov
MLA “12975 Efremov.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Nov. 2026, https://4ort.xyz/entity/12975-efremov.
BibTeX @misc{4ortxyz_12975-efremov_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{12975 Efremov}}, year = {2026}, url = {https://4ort.xyz/entity/12975-efremov}, note = {Accessed: 2026-11-10}}
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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. 13d ago · AbzalM · 2026-10-31 view diff on Wikidata ↗
    Periapsis → 2.221647 astronomical unit, 2.218836 astronomical unit
    Orbital period → 4.16 year, 1,519.530563 day
    Instance of → asteroid
    Discoverer or inventor → Nikolai Chernykh
    + 19 other properties edited (see Wikidata diff for full list)
    "Changed [kaa] labels, descriptions, aliases and claims: kaawiki sitelink"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.