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(17487) 1991 SY

minor planet
Place asteroid Q4541897
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(17487) 1991 SY

Summary

(17487) 1991 SY is an asteroid[1]. (17487) 1991 SY is known by 3 alternative names across languages and contexts.[2]

Key Facts

  • (17487) 1991 SY is credited with the discovery of Robert H. McNaught[3].
  • (17487) 1991 SY's instance of is recorded as asteroid[4].
  • (17487) 1991 SY's site of astronomical discovery is recorded as Siding Spring Observatory[5].
  • (17487) 1991 SY's follows is recorded as 17486 Hodler[6].
  • (17487) 1991 SY's followed by is recorded as 17488 Mantl[7].
  • (17487) 1991 SY's minor planet group is recorded as asteroid belt[8].
  • (17487) 1991 SY's parent astronomical body is recorded as Sun[9].
  • (17487) 1991 SY's provisional designation is recorded as 1981 FF1[10].
  • (17487) 1991 SY's provisional designation is recorded as 1990 HR4[11].
  • (17487) 1991 SY's provisional designation is recorded as 1991 SY[12].
  • (17487) 1991 SY's time of discovery or invention is recorded as +1991-09-30T00:00:00Z[13].
  • (17487) 1991 SY's Freebase ID is recorded as /m/0h63_py[14].
  • (17487) 1991 SY's JPL Small-Body Database SPK-ID is recorded as 20017487[15].
  • (17487) 1991 SY's orbital eccentricity is recorded as {'amount': '+0.1249910'}[16].
  • (17487) 1991 SY's orbital eccentricity is recorded as {'amount': '+0.1285291028990314'}[17].
  • (17487) 1991 SY's absolute magnitude is recorded as {'amount': '+13.3'}[18].
  • (17487) 1991 SY's absolute magnitude is recorded as {'amount': '+13.46'}[19].
  • (17487) 1991 SY's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+13.64966'}[20].
  • (17487) 1991 SY's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+13.66192067390332'}[21].
  • (17487) 1991 SY's orbital period is recorded as {'unit': 'Q577', 'amount': '+4.4'}[22].
  • (17487) 1991 SY's orbital period is recorded as {'unit': 'Q573', 'amount': '+1605.068110283357'}[23].
  • (17487) 1991 SY's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+28.77742'}[24].
  • (17487) 1991 SY's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+28.68696233914585'}[25].
  • (17487) 1991 SY's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.6851865'}[26].
  • (17487) 1991 SY's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.6828518609373'}[27].

Body

Designation and Status

(17487) 1991 SY's instance of is recorded as asteroid[4].

Why It Matters

(17487) 1991 SY is known by 3 alternative names across languages and contexts.[2]

References

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

Direct Wikidata claims

  1. [4] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  2. [3] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [5] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  9. [11] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  10. [12] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  11. [13] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . JPL Small-Body Database. Retrieved . wikidata.org.
  14. [16] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  15. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  16. [18] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  17. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  18. [20] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  19. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  20. [22] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  21. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  22. [24] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  23. [25] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  24. [26] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  25. [27] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata aliases. 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). (17487) 1991 SY. Retrieved May 3, 2026, from https://4ort.xyz/entity/17487-1991-sy
MLA “(17487) 1991 SY.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/17487-1991-sy.
BibTeX @misc{4ortxyz_17487-1991-sy_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(17487) 1991 SY}}, year = {2026}, url = {https://4ort.xyz/entity/17487-1991-sy}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (17487) 1991 SY — https://4ort.xyz/entity/17487-1991-sy (retrieved 2026-05-03)

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