10415 Mali Lošinj

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10415 Mali Lošinj
Discovery [1]
Discovered by K. Korlević
Discovery site Višnjan Obs.
Discovery date 23 October 1998
MPC designation (10415) Mali Lošinj
Named after
Mali Lošinj
(Croatian island)[2]
1998 UT15 · 1925 VM
1962 WE1 · 1977 TN3
1987 SW20 · 1988 VW7
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 54.52 yr (19,915 days)
Aphelion 3.0650 AU
Perihelion 2.9115 AU
2.9883 AU
Eccentricity 0.0257
5.17 yr (1,887 days)
0° 11m 26.88s / day
Inclination 14.427°
Physical characteristics
Dimensions 13.514±0.135[4]
14.912±0.112 km[5]
16.20±0.70 km[6]
18.77 km (calculated)[3]
240.5115±20.6153 h[7]
0.057 (assumed)[3]
C[3] · X[8]
11.54±0.44[8] · 11.8[5][6] · 11.9[1] · 11.911±0.002 (R)[7] · 12.36[3]

10415 Mali Lošinj, provisional designation 1998 UT15, is a dark background asteroid and very slow rotator from the outer region of the asteroid belt, approximately 16 kilometers in diameter. It was discovered by Croatian astronomer Korado Korlević at Višnjan Observatory, Croatia, on 23 October 1998.[9] The asteroid was named after the Croatian island of Mali Lošinj.

Orbit and classification[edit]

Mali Lošinj orbits the Sun in the outer main-belt at a distance of 2.9–3.1 AU once every 5 years and 2 months (1,887 days). Its orbit has an eccentricity of 0.03 and an inclination of 14° with respect to the ecliptic.[1] The first used precovery was obtained at Goethe Link Observatory in 1962, extending the asteroid's observation arc by 36 years prior to its discovery. The first unused observations were made at Heidelberg Observatory in 1925.[9]

Physical characteristics[edit]

The asteroid has also been characterized as a X-type asteroid by Pan-STARRS photometric survey.[3][8]

Slow rotators[edit]

In September 2013, photometric observations at the Palomar Transient Factory in California gave a rotational lightcurve that showed a period of 240.5115 hours with a brightness amplitude of 0.48 in magnitude (U=2).[7] Mali Lošinj is a slow rotator, as asteroids of this size usually rotate within hours once around its axis.

Diameter and albedo[edit]

According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, Mali Lošinj measures between 13.5 and 16.2 kilometers in diameter and its surface has an albedo between 0.13 and 0.15.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a somewhat larger diameter of 18.8 kilometers with an absolute magnitude of 12.36.[3]


This minor planet was named after the Croatian island of Mali Lošinj, located in the northern Adriatic Sea. The island and the city of Mali Lošinj are well known for its nautical school and the Leo Brener Observatory.[2] The minor planet 10645 Brač is also named after a Croatian island in the Adriatic Sea. The approved naming citation was published by the Minor Planet Center on 15 December 2005 (M.P.C. 55720).[10]


  1. ^ a b c d "JPL Small-Body Database Browser: 10415 Mali Losinj (1998 UT15)" (2017-06-05 last obs.). Jet Propulsion Laboratory. Retrieved 23 June 2017. 
  2. ^ a b Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (10415) Mali Lošinj, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 54. ISBN 978-3-540-34360-8. Retrieved 12 April 2016. 
  3. ^ a b c d e f g "LCDB Data for (10415) Mali Losinj". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016. 
  4. ^ 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 4 December 2016. 
  5. ^ 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 17 May 2016. 
  6. ^ 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 17 May 2016. 
  7. ^ 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 17 May 2016. 
  8. ^ 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 17 May 2016. 
  9. ^ a b "10415 Mali Losinj (1998 UT15)". Minor Planet Center. Retrieved 12 April 2016. 
  10. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016. 

External links[edit]