15460 Manca

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15460 Manca
Discovery [1]
Discovered by A. Boattini
L. Tesi
Discovery site San Marcello Pistoiese Obs.
Discovery date 25 December 1998
MPC designation (15460) Manca
Named after
Francesco Manca
(Italian astronomer)[2]
1998 YD10 · 1994 ET1
main-belt · Koronis[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 66.30 yr (24,216 days)
Aphelion 3.1671 AU
Perihelion 2.6460 AU
2.9065 AU
Eccentricity 0.0896
4.96 yr (1,810 days)
0° 11m 56.04s / day
Inclination 3.2872°
Physical characteristics
Dimensions 5.17 km (calculated)[3]
5.354±0.315 km[4][5]
7.2723±0.0209 h[6]
0.24 (assumed)[3]
X[7] · S[3]
12.97±0.29[7] · 13.3[4] · 13.6[1][3] · 14.114±0.005 (S)[6]

15460 Manca, provisional designation 1998 YD10, is a Koronian asteroid from the outer region of the asteroid belt, approximately 5 kilometers in diameter.

The asteroid was discovered on 25 December 1998, by Italian astronomers Andrea Boattini and Luciano Tesi at Pistoia Mountains Astronomical Observatory in San Marcello Pistoiese, central Italy.[8] It was named for Italian amateur astronomer Francesco Manca.[2]

Orbit and classification[edit]

Manca belongs to the Koronis family, a family of stony asteroids in the outer main-belt with nearly ecliptical orbits. It orbits the Sun at a distance of 2.6–3.2 AU once every 4 years and 12 months (1,810 days). Its orbit has an eccentricity of 0.09 and an inclination of 3° with respect to the ecliptic.[1]

The asteroid's observation arc begins 48 years prior to its official discovery observation, with a precovery taken at the Palomar Observatory in March 1950.[8]

Physical characteristics[edit]

Manca has also been characterized as a X-type asteroid by Pan-STARRS' photometric survey.[7]

Rotation period[edit]

In August 2012, a rotational lightcurve was obtained for Manca from photometric observations made at the Palomar Transient Factory, California. It gave it a rotation period of 7.2723 hours with a brightness variation of 0.22 magnitude (U=2).[6]

Diameter and albedo[edit]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Manca measures 5.35 kilometers in diameter and its surface has an albedo of 0.295.[4][5] The Collaborative Asteroid Lightcurve Link assumes a stony standard albedo for members of the Koronis family of 0.24, and calculates a diameter of 5.17 kilometers with an absolute magnitude of 13.6.[3]


This minor planet was named for Italian amateur astronomer Francesco Manca (born 1966), member of the "Gruppo Astrofili Brianza" and an active observer of near-Earth objects, and potentially hazardous asteroids in particular, at Sormano Astronomical Observatory in northern Italy.[2] The official naming citation was published by the Minor Planet Center on 13 October 2000 (M.P.C. 41388).[9]


  1. ^ a b c d "JPL Small-Body Database Browser: 15460 Manca (1998 YD10)" (2016-07-08 last obs.). Jet Propulsion Laboratory. Retrieved 26 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (15460) Manca. Springer Berlin Heidelberg. p. 825. ISBN 978-3-540-00238-3. Retrieved 5 November 2016. 
  3. ^ a b c d e f "LCDB Data for (15460) Manca". Asteroid Lightcurve Database (LCDB). Retrieved 5 November 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" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 5 November 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:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 5 November 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 5 November 2016. 
  7. ^ a b c 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 5 November 2016. 
  8. ^ a b "15460 Manca (1998 YD10)". Minor Planet Center. Retrieved 5 November 2016. 
  9. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 5 November 2016. 

External links[edit]