| Discovery[1] | |
|---|---|
| Discovered by | L. Boyer |
| Discovery site | Algiers Obs. |
| Discovery date | 4 March 1937 |
| Designations | |
| (1416) Renauxa | |
Named after | J. Renaux[2](astronomer at the discovering observatory) |
| 1937 EC · 1930 XE A914 TB · A919 SC | |
| main-belt · (outer) Eos[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 102.64 yr (37,489 days) |
| Aphelion | 3.3394AU |
| Perihelion | 2.6961 AU |
| 3.0178 AU | |
| Eccentricity | 0.1066 |
| 5.24yr (1,915 days) | |
| 194.18° | |
| 0° 11m 16.8s / day | |
| Inclination | 10.033° |
| 352.60° | |
| 66.106° | |
| Physical characteristics | |
| Dimensions | 22.24±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] |
| 4.2h(poor)[a] 4.3 h(superseded)[12] 8.700±0.004 h[13] | |
| 0.09±0.06[9] 0.09±0.07[10] 0.112±0.006[11] 0.1122(derived)[3] 0.1357±0.0159[8] 0.1459±0.031[7] 0.205±0.028[5] 0.212±0.009[6] | |
| 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 designation1937 EC, is an Eonasteroid from the outer regions of theasteroid belt, approximately 29 kilometers in diameter. It was discovered on 4 March 1937, by French astronomerLouis Boyer at theAlgiers Observatory in Algeria, North Africa.[15] It was named after Joseph Renaux, an astronomer at the discovering observatory.[2][16]
Renauxa is a member theEos family (606),[3][4] the largestasteroid family in theouter main belt consisting of nearly 10,000 asteroids.[17]: 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 aneccentricity of 0.11 and aninclination of 10° with respect to theecliptic.[1]
The asteroid was first identified asA914 TB atHeidelberg Observatory in October 1914, where itsobservation arc begins with its identification as1919 SC in September 1919, more than 17 years prior to its official discovery observation at Algiers.[15]
Renauxa has been characterized as aK-type asteroid,[14] one of the first of such type ever identified and in line with the overallspectral type for members of the Eos family.[17]: 23 In theTholen classification, it is classified as anS-type asteroid.[1] This is a known misclassification as S- and K-types are identical in the visual part of the spectrum.[14]
In December 2009, a rotationallightcurve ofRenauxa was obtained from photometric observations by Richard Durkee at the S.O.S. Observatory (H39). Lightcurve analysis gave a well-definedrotation period of 8.700 hours with a low brightness variation of 0.11magnitude (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.
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Renauxa measures between 22.24 and 34.42 kilometers in diameter and its surface has analbedo between 0.09 and 0.212.[5][6][7][8][9][10][11]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1122 and a diameter of 28.75 kilometers based on anabsolute magnitude of 10.7.[3]
Thisminor planet was named after P. Renaux, a French astronomer and assistant at the discoveringAlgiers Observatory. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 128).[2]
