16879 Campai

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16879 Campai
Discovery [1]
Discovered by A. Boattini
M. Tombelli
Discovery site Pistoia Mountains Obs.
Discovery date 24 January 1998
MPC designation (16879) Campai
Named after
Paolo Campai [2]
(Italian amateur astronomer)
1998 BH10
main-belt[1][3] · (middle)
Orbital characteristics[3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc 39.78 yr (14,529 d)
Aphelion 2.8229 AU
Perihelion 2.6938 AU
2.7584 AU
Eccentricity 0.0234
4.58 yr (1,673 d)
0° 12m 54.36s / day
Inclination 7.1221°
Physical characteristics
Mean diameter
10.61 km (calculated)[5]
314.2468±4.9149 h[6]
0.057 (assumed)[5]
S[7] · C (assumed)[5]
13.3[3] · 13.6[5]

16879 Campai, provisional designation 1998 BH10, is a stony Witt asteroid and slow rotator from the central region of the asteroid belt, approximately 10 kilometers (6 miles) in diameter. The S-type asteroid was discovered on 24 January 1998, by Italian astronomers Andrea Boattini and Maura Tombelli at the Pistoia Mountains Astronomical Observatory in San Marcello Pistoiese, Tuscany, central Italy.[1] It was named for Italian amateur astronomer Paolo Campai.[2]

Orbit and classification[edit]

Campai is a member of the Witt family (535),[4] a large family of (predominantly) stony asteroids with more than 1,600 known members.[8] It orbits the Sun in the central main-belt at a distance of 2.7–2.8 AU once every 4 years and 7 months (1,673 days; semi-major axis of 2.76 AU). Its orbit has an eccentricity of 0.02 and an inclination of 7° with respect to the ecliptic.[3] The first precovery was obtained at Siding Spring Observatory in July 1977, extending the asteroid's observation arc by 22 years prior to its discovery.[1]

Physical characteristics[edit]

Campai has been characterized as a common, stony S-type asteroid,[5] in line with the overall spectral type for members of the Witt family.[8]:23

Slow rotator[edit]

In October 2010, a rotational lightcurve of Campai was obtained from photometric observations made at the Palomar Transient Factory in California. It rendered an exceptionally long period of 314.2468±4.9149 hours with a brightness amplitude of 0.68 magnitude (U=2).[6] While the result is based on less than full coverage, and may be refined by future observations, Campai is one of the slowest rotating asteroids known to exist.

Diameter and albedo[edit]

The Collaborative Asteroid Lightcurve Link calculates a diameter of 10.5 kilometers with an absolute magnitude of 13.6 and an assumed standard albedo for a carbonaceous asteroid of 0.057.[5]


This minor planet was named for Italian amateur astronomer Paolo Campai (born 1957) from Florence, who is specialized in teaching and astrophotography. Both discoverers made his acquaintance near Florence on a night in 1985, while observing comet 1P/Halley and α Phoenicis.[2] The approved naming citation was published by the Minor Planet Center on 6 August 2003 (M.P.C. 49281).[9]


  1. ^ a b c d "16879 Campai (1998 BH10)". Minor Planet Center. Retrieved 22 March 2016. 
  2. ^ a b c Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (16879) Campai, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 102. ISBN 978-3-540-34360-8. Retrieved 22 March 2016. 
  3. ^ a b c d "JPL Small-Body Database Browser: 16879 Campai (1998 BH10)" (2017-05-01 last obs.). Jet Propulsion Laboratory. Retrieved 26 June 2017. 
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 18 April 2018. 
  5. ^ a b c d e f "LCDB Data for (16879) Campai". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 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" (PDF). The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 18 April 2018. 
  7. ^ a b 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" (PDF). Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 18 April 2018. 
  8. ^ a b Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families" (PDF). Asteroids IV: 297–321. arXiv:1502.01628Freely accessible. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. Retrieved 18 April 2018. 
  9. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016. 

External links[edit]