13058 Alfredstevens

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13058 Alfredstevens
Discovery [1]
Discovered by E. W. Elst
Discovery site La Silla Obs.
Discovery date 19 November 1990
MPC designation (13058) Alfredstevens
Named after
Alfred Stevens
(Belgian painter)[2]
1990 WN3 · 1992 GB7
1992 HB6
main-belt · Vesta[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 26.45 yr (9,662 days)
Aphelion 2.6314 AU
Perihelion 2.0871 AU
2.3593 AU
Eccentricity 0.1154
3.62 yr (1,324 days)
0° 16m 19.2s / day
Inclination 6.1063°
Physical characteristics
Dimensions 2.601±0.409 km[4][5]
3.06 km (calculated)[3]
4.2993±0.0057 h[6]
0.20 (assumed)[3]
14.5[1] · 15.23±0.26[7] · 14.7[4] · 14.483±0.004 (R)[6] · 14.93[3]

13058 Alfredstevens, provisional designation 1990 WN3, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered by Belgian astronomer Eric Elst at ESO's La Silla Observatory in Northern Chile, on 19 November 1990.[8] The asteroid was named for Belgian painter Alfred Stevens.[2]

Orbit and classification[edit]

Based on its orbital elements, Alfredstevens is a member of the Vesta family, a group of asteroids that originated from a massive impact on the Southern Hemnisphere of 4 Vesta, the family's namesake. It orbits the Sun in the inner main-belt at a distance of 2.1–2.6 AU once every 3 years and 7 months (1,324 days). Its orbit has an eccentricity of 0.12 and an inclination of 6° with respect to the ecliptic.[1]

The body's observation arc begins just five days prior to its official discovery observation, with a precovery taken at Palomar Observatory on 14 November 1990.[8]

Physical characteristics[edit]


In January 2013, a rotational lightcurve of Alfredstevens was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 4.2993 hours with a brightness variation of 0.45 magnitude (U=2).[6]

Diameter and albedo[edit]

According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Alfredstevens measures 2.6 kilometers in diameter and its surface has a high albedo of 0.34,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a larger diameter of 3.1 kilometers with an absolute magnitude of 14.93.[3]


This minor planet was named in honor of Belgian painter Alfred Stevens (1823–1906), known for his paintings of elegant modern women.[2] The official naming citation was published by the Minor Planet Center on 30 January 2010 (M.P.C. 68446).[9]


  1. ^ a b c d "JPL Small-Body Database Browser: 13058 Alfredstevens (1990 WN3)" (2017-04-28 last obs.). Jet Propulsion Laboratory. Retrieved 24 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (13058) Alfredstevens. Springer Berlin Heidelberg. p. 835. ISBN 978-3-540-29925-7. Retrieved 12 May 2016.
  3. ^ a b c d e f "LCDB Data for (13058) Alfredstevens". Asteroid Lightcurve Database (LCDB). Retrieved 12 May 2016.
  4. ^ 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. Retrieved 12 May 2016.
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 3 December 2016.
  6. ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 12 May 2016.
  7. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 12 May 2016.
  8. ^ a b "13058 Alfredstevens (1990 WN3)". Minor Planet Center. Retrieved 12 May 2016.
  9. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 12 May 2016.

External links[edit]