1906 Naef

1906 Naef
	Modelled shape of Naef from its lightcurve
Discovery
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)
Alternative designations	1972 RC · 1943 VF; 1952 DG1 · 1965 WF
Minor planet category	main-belt · Vestoid
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	51.33 yr (18,749 days)
Aphelion	2.6944 AU
Perihelion	2.0517 AU
Semi-major axis	2.3731 AU
Eccentricity	0.1354
Orbital period (sidereal)	3.66 yr (1,335 days)
Mean anomaly	94.839°
Mean motion	0° 16m 10.56s / day
Inclination	6.4757°
Longitude of ascending node	354.84°
Argument of perihelion	14.485°
Physical characteristics
Dimensions	6.64 km (calculated); 7.923±0.090; 8.057±0.083 km
Synodic rotation period	11.00818±0.00001 h; 11.009±0.0012 h; 11.0090±0.0002 h; 11.03±0.02 h
Geometric albedo	0.2282±0.0466; 0.234±0.052; 0.4 (assumed)
Spectral type	SQ · V
Absolute magnitude (H)	12.5 · 12.7 · 13.36±0.31

1906 Naef (prov. designation:1972 RC) is a stony vestoid asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 5 September 1972, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland.^[10] It was later named after Swiss banker and amateur astronomer Robert A. Naef.^[2]

Orbit and classification

Naef orbits the Sun in the inner main-belt at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,335 days). Its orbit has an eccentricity of 0.14 and an inclination of 6° with respect to the ecliptic.^[1] The body's observation arc begins with its official discovery observation at Zimmerwald, as previous observation at Turku Observatory (1943 VF) and McDonald Observatory (1952 DG₁) in 1943 and 1952, respectively, remain unused.^[10]

Physical characteristics

According to observations by the Wide-field Infrared Survey Explorer's NEOWISE mission, Naef measures 7.9 and 8.1 kilometers in diameter, and its surface has an albedo of 0.23,^[4]^[5] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.40 and calculates a diameter of 6.6 kilometer with an absolute magnitude of 12.5.^[3]

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. PanSTARRS' photometric survey has characterized it as a SQ-type that transitions to the Q-type asteroids.^[9]

Four rotational lightcurves, obtained during 2005–2009, gave a well-defined rotation period between 11.01 and 11.03 hours, and a brightness variation of 0.92–0.95 magnitude (U=n.a./3/n.a./2+).^[6]^[7]^[8]^[a]

Naming

This 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] The official naming citation was published by the Minor Planet Center on 18 April 1977 (M.P.C. 4157).^[11]

Notes

^ ^a ^b 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

References

^ ^a ^b ^c ^d "JPL Small-Body Database Browser: 1906 Naef (1972 RC)" (2017-03-21 last obs.). Jet Propulsion Laboratory. Retrieved 9 June 2017.
^ ^a ^b ^c Schmadel, Lutz D. (2007). "(1906) Naef". Dictionary of Minor Planet Names – (1906) Naef. Springer Berlin Heidelberg. p. 153. doi:10.1007/978-3-540-29925-7_1907. ISBN 978-3-540-00238-3.
^ ^a ^b ^c ^d ^e ^f "LCDB Data for (1906) Naef". Asteroid Lightcurve Database (LCDB). Retrieved 11 December 2016.
^ ^a ^b ^c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 11 December 2016.
^ ^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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
^ ^a ^b Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 11 December 2016.
^ ^a ^b 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 11 December 2016.
^ ^a ^b 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 11 December 2016.
^ ^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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 11 December 2016.
^ ^a ^b "1906 Naef (1972 RC)". Minor Planet Center. Retrieved 11 December 2016.
^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

External links

The Robert A. Naef Foundation
Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
1906 Naef at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
1906 Naef at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[Pravec-7] 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

[jpldata-1] "JPL Small-Body Database Browser: 1906 Naef (1972 RC)" (2017-03-21 last obs.). Jet Propulsion Laboratory. Retrieved 9 June 2017.

[springer-2] Schmadel, Lutz D. (2007). "(1906) Naef". Dictionary of Minor Planet Names – (1906) Naef. Springer Berlin Heidelberg. p. 153. doi:10.1007/978-3-540-29925-7_1907. ISBN 978-3-540-00238-3.

[lcdb-3] ^ ^a ^b ^c ^d ^e ^f "LCDB Data for (1906) Naef". Asteroid Lightcurve Database (LCDB). Retrieved 11 December 2016.

[Masiero-2014-4] Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 11 December 2016.

[WISE-5] 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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.

[Durech-2016-6] Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 11 December 2016.

[Durkee-2007b-8] 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 11 December 2016.

[Polishook-2010-9] 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 11 December 2016.

[Veres-2015-10] 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 11 December 2016.

[MPC-Naef-11] "1906 Naef (1972 RC)". Minor Planet Center. Retrieved 11 December 2016.

[DoMP-Circular-dates-12] Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

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Discovery^[1]
Modelled shape of Naef from its lightcurve
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]
Alternative designations	1972 RC · 1943 VF 1952 DG₁ · 1965 WF
Minor planet category	main-belt · Vestoid^[3]
Orbital characteristics^[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	51.33 yr (18,749 days)
Aphelion	2.6944 AU
Perihelion	2.0517 AU
Semi-major axis	2.3731 AU
Eccentricity	0.1354
Orbital period (sidereal)	3.66 yr (1,335 days)
Mean anomaly	94.839°
Mean motion	0° 16^m 10.56^s / day
Inclination	6.4757°
Longitude of ascending node	354.84°
Argument of perihelion	14.485°
Physical characteristics
Dimensions	6.64 km (calculated)^[3] 7.923±0.090^[4] 8.057±0.083 km^[5]
Synodic rotation period	11.00818±0.00001 h^[6] 11.009±0.0012 h^[a] 11.0090±0.0002 h^[7] 11.03±0.02 h^[8]
Geometric albedo	0.2282±0.0466^[5] 0.234±0.052^[4] 0.4 (assumed)^[3]
Spectral type	SQ^[9] · V^[3]
Absolute magnitude (H)	12.5^[1]^[3] · 12.7^[5] · 13.36±0.31^[9]