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1739 Meyermann
Discovery
Discovered by	K. Reinmuth
Discovery site	Heidelberg Obs.
Discovery date	15 August 1939
Designations
MPC designation	(1739) Meyermann
Named after	Bruno Meyermann; (German astronomer)
Alternative designations	1939 PF · 1929 TB1; 1935 GN · 1952 HN3; 1953 XO1 · 1963 TG
Minor planet category	main-belt · Flora
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	87.57 yr (31,984 days)
Aphelion	2.5407 AU
Perihelion	1.9812 AU
Semi-major axis	2.2610 AU
Eccentricity	0.1237
Orbital period (sidereal)	3.40 yr (1,242 days)
Mean anomaly	26.730°
Mean motion	0° 17m 23.64s / day
Inclination	3.4093°
Longitude of ascending node	203.35°
Argument of perihelion	82.116°
Physical characteristics
Dimensions	6.62±0.79 km; 7.47 km (calculated); 7.858±0.124; 8.688±0.063 km
Synodic rotation period	2.8212±0.0002 h; 2.8219±0.0002 h
Geometric albedo	0.1961±0.0376; 0.24 (assumed); 0.254±0.015; 0.336±0.116
Spectral type	S
Absolute magnitude (H)	12.63±0.27 · 12.7 · 12.8

1739 Meyermann, provisional designation 1939 PF, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 15 August 1939.^[8] It was later named in memory of astronomer Bruno Meyermann.^[2]

Orbit and classification

Meyermann is a member of the Flora family, a large group of S-type asteroids in the inner main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 5 months (1,242 days). Its orbit has an eccentricity of 0.12 and an inclination of 3° with respect to the ecliptic.^[1] Meyermann was first identified as 1929 TB₁ at Lowell Observatory in 1929, extending the body's observation arc by 10 years prior to its official discovery observation at Heidelberg.^[8]

Rotation period

Two rotational lightcurves of Meyermann were obtained from photometric observations taken by Czech astronomer Petr Pravec at Ondřejov Observatory in 2007 and 2014. They gave a rotation period of 2.8212 and 2.8219 hours with a brightness variation of 0.12 and 0.17 magnitude, respectively (U=3/3).^[a]^[b]

Diameter and albedo

According to the refitted 2014-results from the survey carried out by the Wide-field Infrared Survey Explorer with its NEOWISE missions, Meyermann measures 7.858 kilometers in diameter, and its surface has an albedo of 0.254.^[5] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of its family – and calculates a diameter of 7.47 kilometers based on an absolute magnitude of 12.8.^[3]

Naming

This minor planet was named in memory of Bruno Meyermann (1876–1963), a classical astronomer and academic teacher at Göttingen Observatory in Lower Saxony, Germany. His fields of interest included polar motion and relativistic effects.^[2] The official naming citation was published by the Minor Planet Center on 18 April 1977 (M.P.C. 4155).^[9]

Notes

^ ^a ^b Pravec (2014) web: rotation period 2.8212±0.0002 hours with a brightness amplitude of 0.17. Quality Code of 3. Summary figures at Asteroid Lightcurve Database
^ ^a ^b Pravec (2007) web: rotation period 2.8219±0.0002 hours with a brightness amplitude of 0.22. Quality Code of 3. Summary figures at Asteroid Lightcurve Database

References

^ ^a ^b ^c ^d "JPL Small-Body Database Browser: 1739 Meyermann (1939 PF)" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 7 June 2017.
^ ^a ^b ^c Schmadel, Lutz D. (2007). "(1739) Meyermann". Dictionary of Minor Planet Names – (1739) Meyermann. Springer Berlin Heidelberg. p. 138. doi:10.1007/978-3-540-29925-7_1740. ISBN 978-3-540-00238-3.
^ ^a ^b ^c ^d ^e ^f "LCDB Data for (1739) Meyermann". Asteroid Lightcurve Database (LCDB). Retrieved 20 December 2016.
^ ^a ^b ^c 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 20 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 20 December 2016.
^ ^a ^b ^c 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.
^ 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 20 December 2016.
^ ^a ^b "1739 Meyermann (1939 PF)". Minor Planet Center. Retrieved 20 December 2016.
^ Schmadel, Lutz D. "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.