1563 Noël, provisional designation 1943 EG, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 7 March 1943, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, and named after his son.[2][6]
| Discovery[1] | |
|---|---|
| Discovered by | S. Arend |
| Discovery site | Uccle Obs. |
| Discovery date | 7 March 1943 |
| Designations | |
| (1563) Noël | |
Named after | Emanuel Arend (discoverer's son)[2] |
| 1943 EG · 1930 EF | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.06 yr (31,799 days) |
| Aphelion | 2.3789 AU |
| Perihelion | 2.0037 AU |
| 2.1913 AU | |
| Eccentricity | 0.0856 |
| 3.24 yr (1,185 days) | |
| 347.57° | |
| 0° 18m 13.68s / day | |
| Inclination | 5.9829° |
| 53.649° | |
| 116.41° | |
| Physical characteristics | |
| Dimensions | 7.23±0.51 km[4] 8.98 km (calculated)[3] |
| 3.5483±0.0003 h[a] 3.5486±0.0002 h[a] 3.5488±0.0001 h[a] 3.5495±0.0001 h[a] 3.550±0.002 h[5] | |
| 0.24 (assumed)[3] 0.370±0.051[4] | |
| SMASS = Sa[1] · S[3] | |
| 12.4[1][3][4] | |
Orbit and classification
editNoël is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.0–2.4 AU once every 3 years and 3 months (1,185 days). Its orbit has an eccentricity of 0.09 and an inclination of 6° with respect to the ecliptic.[1] Noël was first identified as 1930 EF at the Crimean Simeiz Observatory in 1930, extending its observation arc by 13 years prior to its official discovery observation.[6]
Physical characteristics
editThe S-type asteroid is characterized as a transitional Sa-subtype on the SMASS taxonomic scheme.[1]
Rotation period
editBetween April 2008 and June 2015, five rotational lightcurves were obtained from photometric observations by Czech astronomer Petr Pravec at the Ondřejov Observatory near Prague. All lightcurves show a well-defined rotation period between 3.548 and 3.550 hours with a brightness variation of 0.15 to 0.18 in magnitude (U=3).[a]
In April 2008, a photometric observation by astronomer Julian Oey at the Kingsgrove Observatory, Australia, gave a concurring period of 3.550±0.002 hours and an amplitude of 0.14 (U=3).[5]
Diameter and albedo
editAccording to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Noël measures 7.2 kilometers in diameter and its surface has a high albedo of 0.37,[4] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the family's principal body and namesake – and calculates a larger diameter of 9.0 kilometers.[3]
Naming
editThis minor planet was named in honor of the discoverer's son, Emanuel Arend (H 138).[2]
Notes
edit- ^ a b c d e Pravec (2008, 2011, 2013, 2015) web: rotation period of 3.5495±0.0001, 3.5483±0.0003, 3.5488±0.0001 and 3.5486±0.0002 hours with a brightness amplitude of 0.15 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1563) Noel and Pravec, P.; Wolf, M.; Sarounova, L. (2011, 2013, 2015)
References
edit- ^ a b c d e f "JPL Small-Body Database Browser: 1563 Noel (1943 EG)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 5 June 2017.
- ^ a b c Schmadel, Lutz D. (2007). "(1563) Noël". Dictionary of Minor Planet Names – (1563) Noël. Springer Berlin Heidelberg. p. 124. doi:10.1007/978-3-540-29925-7_1564. ISBN 978-3-540-00238-3.
- ^ a b c d e f "LCDB Data for (1563) Noel". Asteroid Lightcurve Database (LCDB). Retrieved 18 May 2016.
- ^ 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.
- ^ a b Oey, Julian (January 2009). "Lightcurve Analysis of Asteroids from Leura and Kingsgrove Observatories in the First Half of 2008". The Minor Planet Bulletin. 36 (1): 4–6. Bibcode:2009MPBu...36....4O. ISSN 1052-8091.
- ^ a b "1563 Noel (1943 EG)". Minor Planet Center. Retrieved 19 April 2016.
External links
edit- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1563 Noël at AstDyS-2, Asteroids—Dynamic Site
- 1563 Noël at the JPL Small-Body Database
