2368 Beltrovata

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2368 Beltrovata
Discovery [1]
Discovered by P. Wild
Discovery site Zimmerwald Obs.
Discovery date 4 September 1977
MPC designation 2368 Beltrovata
Named after
Betty Tendering
(friend of Gottfried Keller)[2]
1977 RA
Amor · NEO[1]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 38.65 yr (14,117 days)
Aphelion 2.9746 AU
Perihelion 1.2356 AU
2.1051 AU
Eccentricity 0.4130
3.05 yr (1,116 days)
0° 19m 21.72s / day
Inclination 5.2223°
Earth MOID 0.2342 AU
Physical characteristics
Dimensions 2.3 km[1]
2.70 km (calculated)[3]
3.003±0.493 km[4]
5.9 h[5]
0.20 (assumed)[3]
B–V = 0.830[1]
U–B = 0.520[1]
Tholen = SQ [1] · S[3]
15.21[1][3][4] · 15.33±0.40[6]

2368 Beltrovata, provisional designation 1977 RA, is an eccentric stony asteroid, classified as near-Earth object of the Amor group of asteroids, approximately 2.7 kilometers in diameter. It was discovered on 4 September 1977, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland.[7]

The stony S-type asteroid is also classified as a transitional SQ-type in the Tholen taxonomy. It orbits the Sun at a distance of 1.2–3.0 AU once every 3 years and 1 month (1,116 days). Its orbit has an eccentricity of 0.41 and an inclination of 5° with respect to the ecliptic.[1] As an Amor asteroid, it approaches the orbit of Earth from the outside but does not cross it. It has an Earth minimum orbit intersection distance of 0.2335 AU (35,000,000 km), which corresponds to 91 lunar distances.[1] The asteroid's observation arc begins with its discovering observation.[7]

The first rotational light-curve for this asteroid was obtained from photoelectric observations made by U.S. astronomers Edward Bowell and Schelte Bus in the 1970s (IAUC 3111), and gave a rotation period of 5.9 hours with a brightness variation of 0.84 magnitude (U=n.a.).[8] In 2000, the Near-Earth Objects Follow-up Program published an identical period but with a higher amplitude of 1.05 magnitude.(U=2).[5]

According to the space-based survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 3.0 kilometers in diameter and its surface has an albedo of 0.16,[4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 2.7 kilometers, based on an absolute magnitude of 15.21.[3]

The minor planet is named "Beltrovata", which is the name by whom the Swiss author Gottfried Keller from Zürich called his friend Betty Tendering. She served as role model for the character of "Dortchen Schönfund" in Keller's novel Green Henry.[2] Naming citation was published on 1 August 1981 (M.P.C. 6209).[9]


  1. ^ a b c d e f g h i j k "JPL Small-Body Database Browser: 2368 Beltrovata (1977 RA)" (2016-04-29 last obs.). Jet Propulsion Laboratory. Retrieved 7 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2368) Beltrovata. Springer Berlin Heidelberg. p. 193. ISBN 978-3-540-00238-3. Retrieved 1 September 2016. 
  3. ^ a b c d e "LCDB Data for (2368) Beltrovata". Asteroid Lightcurve Database (LCDB). Retrieved 1 September 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 1 September 2016. 
  5. ^ a b Erikson, A.; Mottola, S.; Lagerros, J. S. V.; Lindgren, M.; Piironen, J.; Oja, T.; et al. (October 2000). "The Near-Earth Objects Follow-up Program. III. 32 Lightcurves for 12 Objects from 1992 and 1995". Icarus. 147 (2): 487–497. Bibcode:2000Icar..147..487E. doi:10.1006/icar.2000.6457. Retrieved 1 September 2016. 
  6. ^ 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 1 September 2016. 
  7. ^ a b "2368 Beltrovata (1977 RA)". Minor Planet Center. Retrieved 1 September 2016. 
  8. ^ Bus, S. J.; Lauer, T.; Gibson, J.; Giclas, H. L.; Kantz, M. L.; Bowell, E.; et al. (September 1977). "1977 RA". IAU Circ. (3111). Bibcode:1977IAUC.3111....2B. Retrieved 1 September 2016. 
  9. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 1 September 2016. 

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