1416 Renauxa

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1416 Renauxa
Discovery [1]
Discovered byL. Boyer
Discovery siteAlgiers Obs.
Discovery date4 March 1937
MPC designation(1416) Renauxa
Named after
P. Renaux [2] (astronomer at the discovering observatory)
1937 EC · 1930 XE
A914 TB · A919 SC
main-belt · (outer)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc102.64 yr (37,489 days)
Aphelion3.3394 AU
Perihelion2.6961 AU
3.0178 AU
5.24 yr (1,915 days)
0° 11m 16.8s / day
Physical characteristics
Dimensions22.24±0.95 km[5]
27.552±0.177 km[6]
28.75 km (derived)[3]
28.95±2.7 km[7]
30.023±0.249 km[8]
33.35±8.99 km[9]
33.50±13.88 km[10]
34.42±0.90 km[11]
4.2 h (poor)[a]
4.3 h (superseded)[12]
8.700±0.004 h[13]
0.1122 (derived)[3]
Tholen = S[1] · K[14]
B–V = 0.790 [1]
U–B = 0.410 [1]
10.40[7][8][11] · 10.60[5][10] · 10.7[1][3] · 10.75[9]

1416 Renauxa, provisional designation 1937 EC, is an Eon asteroid from the outer regions of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 4 March 1937, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa.[15] It was named after P. Renaux, an astronomer at the discovering observatory.[2]

Orbit and classification[edit]

Renauxa is a member the Eos family (606),[3][4] the largest asteroid family in the outer main belt consisting of nearly 10,000 asteroids.[16]:23 It orbits the Sun at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,915 days). Its orbit has an eccentricity of 0.11 and an inclination of 10° with respect to the ecliptic.[1]

The asteroid was first identified as A914 TB at Heidelberg Observatory in October 1914, where its observation arc begins with its identification as 1919 SC in September 1919, more than 17 years prior to its official discovery observation at Algiers.[15]

Physical characteristics[edit]

Renauxa has been characterized as a K-type asteroid,[14] one of the first of such type ever identified and in line with the overall spectral type for members of the Eos family.[16]:23 In the Tholen classification, it is classified as an S-type asteroid.[1] This is a known misclassification as S- and K-types are identical in the visual part of the spectrum.[14]

Rotation period[edit]

In December 2009, a rotational lightcurve of Renauxa was obtained from photometric observations by Richard Durkee at the S.O.S. Observatory (H39). Lightcurve analysis gave a well-defined rotation period of 8.700 hours with a low brightness variation of 0.11 magnitude (U=3),[13] superseding previous observation that gave approximately half the period solution (U=1/2).[12][a] A low brightness amplitude is typical for a spherical rather than elongated shape.

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Renauxa measures between 22.24 and 34.42 kilometers in diameter and its surface has an albedo between 0.09 and 0.212.[5][6][7][8][9][10][11]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1122 and a diameter of 28.75 kilometers based on an absolute magnitude of 10.7.[3]


This minor planet was named after P. Renaux, a French astronomer and assistant at the discovering Algiers Observatory. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 128).[2]


  1. ^ a b Iowa-(2011) web: rotation period 4.2 hours. Quality code of 1. Summary figures at the LCDB


  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 1416 Renauxa (1937 EC)" (2017-06-05 last obs.). Jet Propulsion Laboratory. Retrieved 25 October 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1416) Renauxa". Dictionary of Minor Planet Names – (1416) Renauxa. Springer Berlin Heidelberg. p. 114. doi:10.1007/978-3-540-29925-7_1417. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (1416) Renauxa". Asteroid Lightcurve Database (LCDB). Retrieved 25 October 2017.
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 25 October 2017.
  5. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 25 October 2017.
  6. ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 25 October 2017.
  7. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Archived from the original on 2016-06-03. Retrieved 25 October 2017.
  8. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
  9. ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 25 October 2017.
  10. ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 25 October 2017.
  11. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 25 October 2017.
  12. ^ a b Lagerkvist, C.-I. (March 1978). "Photographic photometry of 110 main-belt asteroids". Astronomy and Astrophysics Supplement Series. 31: 361–381. Bibcode:1978A&AS...31..361L. Retrieved 25 October 2017.
  13. ^ a b Durkee, Russell I. (July 2010). "Asteroids Observed from the Shed of Science Observatory: 2009 October - 2010 March". The Minor Planet Bulletin. 37 (3): 125–127. Bibcode:2010MPBu...37..125D. ISSN 1052-8091. Retrieved 25 October 2017.
  14. ^ a b c Granahan, James C.; Smith, Greg; Bell, Jeffrey F. (March 1993). "New K type asteroids" (PDF). In Lunar and Planetary Inst.: 557. Bibcode:1993LPI....24..557G. Retrieved 25 October 2017.
  15. ^ a b "1416 Renauxa (1937 EC)". Minor Planet Center. Retrieved 25 October 2017.
  16. ^ a b Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). Identification and Dynamical Properties of Asteroid Families. Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.

External links[edit]