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577 Rhea

main-belt asteroid
Thing Asteroid Q155650

Facts

26 properties
Instance of
asteroid
Follows
576 Emanuela[5]
Followed by
578 Happelia[6]
Absolute magnitude
9.45[17]
Albedo
0.23
Apoapsis
3.592134824806365 astronomical unit[23]
Argument of periapsis
329.5962692004758 degree
Diameter
38.234 km
Discoverer or inventor
Max Wolf[2]
Epoch
November 21, 2025
Longitude of ascending node
328.4739293397376 degree[21]
Mean anomaly
357.0947953118136 degree
Minor planet group
asteroid belt[7]
Named after
Rhea[4]
Orbital eccentricity
0.1536934619275099[16]
Orbital inclination
5.298408113933674 degree[18]
Orbital period
2,006.742843784959 day[19]
Parent astronomical body
Sun[8]
Periapsis
2.635056267712923 astronomical unit[24]
Provisional designation
A905 UR, 1943 QD, 1949 SF1, 1952 DC, A912 AC[9][10][11][12][13]
Rotation period
12.249 hour[20]
Semi-major axis of an orbit
3.113595546259644 astronomical unit[22]
Significant event
naming[15]
Site of astronomical discovery
Heidelberg-Königstuhl State Observatory[3]
Show all 26 facts +2
Time of discovery or invention
October 20, 1905[14]
Time of periapsis
2,461,016.6944408827 Julian day
🏷️ Also known as
en (577) Rhea en Rhea de 577 Rhéa el 577 Ρέα fa سیارک ۵۷۷ fr (577) Rhéa fr Rhéa ja レア ru Рея ru 1943 QD ru 1905 RH ru 1949 SF1 ru 1952 DC ru (577) 1905 RH ru (577) Рея ru A905RH ru A912 AC uk 577 Рея zh 母神星
🔖 Identifiers · 3
Freebase ID
/m/08lxsl
JPL Small-Body Database SPK-ID
20000577
Minor Planet Center body ID
577

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Summary

577 Rhea is an asteroid[1].

References

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

Direct Wikidata claims

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

Class ancestry

  1. [1] ↑ . Wikidata. 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). 577 Rhea. Retrieved November 13, 2026, from https://4ort.xyz/entity/577-rhea
MLA “577 Rhea.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Nov. 2026, https://4ort.xyz/entity/577-rhea.
BibTeX @misc{4ortxyz_577-rhea_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{577 Rhea}}, year = {2026}, url = {https://4ort.xyz/entity/577-rhea}, note = {Accessed: 2026-11-13}}
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