1985 Hopmann

1985 Hopmann
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 13 January 1929
Designations
MPC designation 1985 Hopmann
Named after
 Josef Hopman
(German astronomer)[2]
1929 AE · 1951 CA2
1951 CP · 1952 KE
1964 PJ · 1973 AA4
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 87.00 yr (31,775 days)
Aphelion 3.6025 AU
Perihelion 2.6415 AU
3.1220 AU
Eccentricity 0.1539
5.52 yr (2,015 days)
262.87°
0° 10m 43.32s / day
Inclination 17.157°
305.16°
234.15°
Physical characteristics
Dimensions 35.47 km (derived)[3]
35.51±3.1 km (IRAS:6)[1]
44.33±3.53 km[4]
17.476±0.003 h[5]
17.478±0.004 h[6]
17.4787±0.0001 h[7]
17.480±0.002 h[8]
0.039±0.007 (IRAS:6)[4]
0.0613 (derived)[3]
C [3]
10.75±0.19[9]
10.9[1][3]
10.91[4]

    1985 Hopmann, provisional designation 1929 AE, is a carbonaceous asteroid in the outer regions of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 13 January 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.[10]

    The dark C-type asteroid orbits the Sun at a distance of 2.6–3.6 AU once every 5 years and 6 months (2,015 days). Its orbit has an eccentricity of 0.15 and an inclination of 17° with respect to the ecliptic.[1] The first observation used for the body's observation arc was taken at the discovering observatory on 4 February 1926, or 22 days after its official discovering observation.[10]

    According to the survey carried out by the Infrared Astronomical Satellite IRAS, the asteroid measures 35.51 kilometers in diameter.[1] The Collaborative Asteroid Lightcurve Link agrees with the Supplemental IRAS Minor Planet Survey (SIMPS) data and derives an albedo of 0.039 and a diameter of 35.47 kilometers,[3] while observations with NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission gave an albedo of 0.06 and a diameter of 44.33 kilometers.[4]

    In January and February 2012, three rotational light-curves were obtained by Robert D. Stephens at Santana Observatory (646), California, Josep Maria Aymami at Carmelita Observatory (B20), Barcelona, and Patricia Moravec at Oakley Southern Sky Observatory (E09), Australia. The light-curves gave a well-defined rotation period of 17.476, 17.478 and 17.480 hours, respectively, with a brightness variation between 0.36 and 0.44 magnitude (U=3/3/3-).[5][6][8] In 2016, a re-modeled light-curve, constructed from data compiled in the Lowell Photometric Database, also gave a concurring period.[7]

    The minor planet was named in memory of German astronomer Josef Hopmann (1890–1975), a director of Vienna Observatory between 1951 and 1962, a productive observer of variable and binary stars, and a participant in the international program to observe near-Earth asteroid 433 Eros in the early 1930s. The lunar crater Hopmann is also named in his honour.[2] Naming citation was published before November 1977 (M.P.C. 4237).[11]

    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 1985 Hopmann (1929 AE)" (2016-01-28 last obs.). Jet Propulsion Laboratory. Retrieved 25 October 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1985) Hopmann. Springer Berlin Heidelberg. p. 160. ISBN 978-3-540-00238-3. Retrieved 25 October 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (1985) Hopmann". Asteroid Lightcurve Database (LCDB). Retrieved 25 October 2016.
    4. 1 2 3 4 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 25 October 2016.
    5. 1 2 Aymami, Josep Maria (July 2012). "CCD Photometry and Lightcurve Analysis of Main-Belt Asteroids 14 Irene 4874 Burke, 1985 Hopmann, 3017 Petrovic, and 3070 Aitken from Observatori Carmelita in Tiana". The Minor Planet Bulletin. 39 (3): 179–181. Bibcode:2012MPBu...39..179A. ISSN 1052-8091. Retrieved 25 October 2016.
    6. 1 2 Moravec, Patricia; Cochren, Joseph; Gerhardt, Michael; Harris, Andrew; Karnemaat, Ryan; Melton, Elizabeth; et al. (October 2012). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2012 January-April". The Minor Planet Bulletin. 39 (4): 213–216. Bibcode:2012MPBu...39..213M. ISSN 1052-8091. Retrieved 25 October 2016.
    7. 1 2 Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909Freely accessible. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 25 October 2016.
    8. 1 2 Stephens, Robert D. (July 2012). "Asteroids Observed from GMARS and Santana Observatories: 2012 January - March". The Minor Planet Bulletin. 39 (3): 181–183. Bibcode:2012MPBu...39..181S. ISSN 1052-8091. Retrieved 25 October 2016.
    9. ↑ 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 25 October 2016.
    10. 1 2 "1985 Hopmann (1929 AE)". Minor Planet Center. Retrieved 25 October 2016.
    11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 25 October 2016.

    External links

    This article is issued from Wikipedia - version of the 10/25/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.