2829 Bobhope
Shape model of Bobhope from its lightcurve
Discovery [1]
Discovered byE. L. Johnson
Discovery siteJohannesburg Obs.
Discovery date9 August 1948
Designations
(2829) Bobhope
Named after
Bob Hope
(American actor; comedian)[2]
1948 PK · 1942 JH
1952 DU2 · 1952 HR
1959 RV · 1972 YZ
main-belt · (outer) [3]
Meliboea [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc68.64 yr (25,070 days)
Aphelion3.6742 AU
Perihelion2.5074 AU
3.0908 AU
Eccentricity0.1888
5.43 yr (1,985 days)
272.56°
0° 10m 53.04s / day
Inclination14.301°
324.06°
339.21°
Physical characteristics
Mean diameter
32.14±9.31 km[5]
36.29±12.47 km[6]
38.25±2.4 km[7]
40.89±0.87 km[8]
40.98±0.54 km[9]
41.361±0.224 km[10]
44.804±0.511 km[11]
5.013±0.003 h[12]
6.0888±0.0007 h[13]
0.05±0.03[6]
0.055±0.010[10][8]
0.06±0.05[5]
0.0668±0.0182[11]
0.080±0.003[9]
0.0916±0.013[7]
C [3]
10.3[7][9][11] · 10.70[5][8] · 10.8[1][3] · 10.95±0.48[14] · 11.12[6]

    2829 Bobhope (prov. designation: 1948 PK) is a dark asteroid of the Meliboea family, from the outer region of the asteroid belt. It was discovered on 9 August 1948, by South African astronomer Ernest Leonard Johnson at Union Observatory in Johannesburg.[15] The asteroid was later named after comedian Bob Hope.[2] The asteroid has a rotation period of 6.1 hours and measures approximately 37 kilometers (23 miles) in diameter.

    Orbit and classification

    Bobhope is a member of the Meliboea family,[4] a smaller asteroid family of carbonaceous outer-belt asteroids with a few hundred members, named after 137 Meliboea.[16]: 23  It orbits the Sun in the outer main-belt at a distance of 2.5–3.7 AU once every 5 years and 5 months (1,985 days). Its orbit has an eccentricity of 0.19 and an inclination of 14° with respect to the ecliptic.[1] It was first observed as 1942 JH at the discovering observatory in May 1942, yet the astrometric data from this observation remained unused to extend its observation arc prior to the official discovery date.[15]

    Naming

    This minor planet was named for English-born, American comedian Bob Hope (1903–2003), star of innumerable feature film, theater, TV and radio productions, and known for the horror comedy Cat and the Canary (1939).[2] He hosted the Academy Awards more than any other host, and received several Honorary and Special Oscars himself. Hope also received more than forty honorary doctorates.[2] The naming was published by the Minor Planet Center on 1 September 1993 (M.P.C. 22496).[17]

    Physical characteristics

    Bobhope has been characterized as a carbonaceous C-type asteroid,[3] which agrees with the overall spectral type of the Meliboea family.[16]: 23 

    Rotation period

    A rotational lightcurve of Bobhope was obtained from photometric observations by astronomer Landy Carbo at Oakley Southern Sky Observatory (E09), Australia, and at the U.S. Oakley Observatory in September 2008. It gave it a rotation period of 5.013±0.003 hours with a brightness variation of 0.46±0.08 magnitude (U=2).[12] A previously published lightcurve by French amateur astronomer Bernard Christophe gave a somewhat longer period of 6.0888±0.0007 hours with an amplitude of 0.50 (U=2).[13]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Bobhope measures between 32.14 and 40.98 kilometers in diameter and its surface has an albedo between 0.05 and 0.0916.[5][6][7][8][9] More dated NEOWISE publications gave a larger diameter of 41.361 and 44.8 kilometers, respectively.[10][11] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0586 and a diameter of 38.0 kilometers with an absolute magnitude of 10.8.[3]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 2829 Bobhope (1948 PK)" (2017-03-30 last obs.). Jet Propulsion Laboratory. Retrieved 14 June 2017.
    2. 1 2 3 4 Schmadel, Lutz D. (2007). "(2829) Bobhope". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 232. doi:10.1007/978-3-540-29925-7_2830. ISBN 978-3-540-00238-3.
    3. 1 2 3 4 5 "LCDB Data for (2829) Bobhope". Asteroid Lightcurve Database (LCDB). Retrieved 27 October 2016.
    4. 1 2 "Asteroid 2829 Bobhope – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
    5. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 14 June 2017.
    6. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
    7. 1 2 3 4 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    8. 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 27 October 2016.
    9. 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
    10. 1 2 3 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 27 October 2016.
    11. 1 2 3 4 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.
    12. 1 2 Carbo, Landy; Kragh, Katherine; Krotz, Jonathan; Meiers, Andrew; Shaffer, Nelson; Torno, Steven; et al. (July 2009). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory and Oakley Observatory: 2008 September and October" (PDF). Minor Planet Bulletin. 36 (3): 91–94. Bibcode:2009MPBu...36...91C. ISSN 1052-8091. Archived from the original (PDF) on 26 November 2021. Retrieved 18 March 2020.
    13. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (2829) Bobhope". Geneva Observatory. Retrieved 14 June 2017.
    14. ↑ 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 27 October 2016.
    15. 1 2 "2829 Bobhope (1948 PK)". Minor Planet Center. Retrieved 27 October 2016.
    16. 1 2 Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
    17. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 27 October 2016.
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