1906 Naef

1906 Naef
Discovery [1]
Discovered by P. Wild
Discovery site Zimmerwald Obs.
Discovery date 5 September 1972
Designations
MPC designation 1906 Naef
Named after
 Robert A. Naef
(amateur astronomer)[2]
1972 RC · 1943 VF
1952 DG1 · 1965 WF
main-belt · Vestoid [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 49.73 yr (18164 days)
Aphelion 2.6948 AU (403.14 Gm)
Perihelion 2.0518 AU (306.94 Gm)
2.3733 AU (355.04 Gm)
Eccentricity 0.13546
3.66 yr (1335.4 d)
292.98°
0° 16m 10.452s / day
Inclination 6.4759°
354.85°
14.618°
Earth MOID 1.04963 AU (157.022 Gm)
Jupiter MOID 2.75981 AU (412.862 Gm)
Jupiter Tisserand parameter 3.522
Physical characteristics
Dimensions 8.057±0.083 km[4]
6.64 km (calculated)[3]
11.009 h (0.4587 d)[lower-alpha 1][1][5]
11.03±0.02 h[6]
0.2282±0.0466[4]
0.4 (assumed)[3]
V [3]
12.5[1]

    1906 Naef, provisional designation 1972 RC, is a stony vestoid asteroid from the inner regions of the asteroid belt, about 7 kilometers in diameter. It was discovered by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, on 5 September 1972.[7]

    The asteroid orbits the Sun at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,335 days). Its orbit is tilted by 6 degrees to the plane of the ecliptic and shows an eccentricity of 0.14. It has a well-defined rotation period of 11.0 hours.[lower-alpha 1][5][6] According to observations by the Wide-field Infrared Survey Explorer's NEOWISE mission, the body's surface has an albedo of 0.23, while the Collaborative Asteroid Lightcurve Link assumes a higher value of 0.40.[3][4]

    1906 Naef is a vestoid or V-type asteroid, with its spectral type comparable to that of the group's namesake, 4 Vesta. V-type asteroids are less common than the abundant S-type asteroids, but they are similar in their stony composition, except for their higher concentration of pyroxenes, an aluminium-rich silicate mineral.

    The minor planet was named after Swiss banker Robert A. Naef (1907–1975) from Zürich, an ardent amateur astronomer, who produced the yearly observers almanac, Der Sternenhimmel, since 1940.[2]

    References

    1. 1 2 Pravec (2005) web: rotation period 11.009±0.0012 hours with a brightness amplitude of 0.92 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1906) Naef
    1. 1 2 3 4 "JPL Small-Body Database Browser: 1906 Naef (1972 RC)" (2015-08-14 last obs.). Jet Propulsion Laboratory. Retrieved 19 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1906) Naef. Springer Berlin Heidelberg. p. 153. ISBN 978-3-540-29925-7. Retrieved 15 December 2015.
    3. 1 2 3 4 5 "LCDB Data for (1906) Naef". Asteroid Lightcurve Database (LCDB). Retrieved 15 December 2015.
    4. 1 2 3 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 15 December 2015.
    5. 1 2 Durkee, Russell I.; Pravec, Petr (June 2007). "The Lightcurve of Asteroid 1906 NAEF". The Minor Planet Bulletin. 34 (2): 49. Bibcode:2007MPBu...34...49D. ISSN 1052-8091. Retrieved 15 December 2015.
    6. 1 2 Polishook, David (April 2010). "Lightcurves and Spin Periods from the Wise Observatory - 2009". The Minor Planet Bulletin. 37 (2): 65–69. Bibcode:2010MPBu...37...65P. ISSN 1052-8091. Retrieved 15 December 2015.
    7. ↑ "1906 Naef (1972 RC)". Minor Planet Center. Retrieved 15 December 2015.

    External links


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