1165 Imprinetta

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1165 Imprinetta
Discovery [1]
Discovered byH. van Gent
Discovery siteJohannesburg Obs.
(Leiden Southern Station)
Discovery date24 April 1930
MPC designation(1165) Imprinetta
Named after
Imprinetta Gent
(wife of the discoverer)[2]
1930 HM · A909 TA
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc107.47 yr (39,253 days)
Aphelion3.7891 AU
Perihelion2.4589 AU
3.1240 AU
5.52 yr (2,017 days)
0° 10m 42.6s / day
Physical characteristics
Dimensions47.14±15.99 km[5]
48.65 km (derived)[3]
48.82±1.9 km[6]
50.30±14.80 km[7]
53.187±0.325 km[8]
53.40±1.62 km[9]
56.44±0.87 km[10]
59.378±0.290 km[11]
7.9374±0.0016 h[12]
8.107±0.010 h[13]
0.0392 (derived)[3]
10.30[6][9][11] · 10.69±0.38[14] · 10.70[1][3][5][7][10]

1165 Imprinetta, provisional designation 1930 HM, is a carbonaceous Meliboean asteroid from the outer regions of the asteroid belt, approximately 49 kilometers in diameter. It was discovered on 24 April 1930, by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa.[15] The asteroid was named after Imprinetta Gent, wife of the discoverer.[2]

Orbit and classification[edit]

Imprinetta is a member of the Meliboea family, a smaller asteroid family of carbonaceous outer-belt asteroids with a few hundred members, named after 137 Meliboea.[4][16]:23

This asteroid orbits the Sun in the outer main-belt at a distance of 2.5–3.8 AU once every 5 years and 6 months (2,017 days). Its orbit has an eccentricity of 0.21 and an inclination of 13° with respect to the ecliptic.[1]

The body's observation arc begins with its first identification as A909 TA at Heidelberg Observatory in October 1909, more than 20 years prior to its official discovery observation at Johannesburg.[15]

Physical characteristics[edit]

Imprinetta has been characterized as a carbonaceous C-type asteroid by PanSTARRS photometric survey,[3][14] which corresponds with the overall spectral type of the Meliboea family.[16]:23

Rotation period[edit]

In October 2003, a rotational lightcurve of Imprinetta was obtained from photometric observations by American John Menke at his observatory in Barnesville, Maryland. Lightcurve analysis gave a well-defined rotation period of 8.107 hours with a brightness variation of 0.20 magnitude (U=3).[13] An alternative observation gave a lightcurve with period of 7.9374 hours and an amplitude of 0.20 magnitude (U=2).[12]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Imprinetta measures between 47.14 and 59.378 kilometers in diameter and its surface has an albedo between 0.029 and 0.0562.[5][6][7][8][9][10][11]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0392 and a diameter of 48.65 kilometers based on an absolute magnitude of 10.7.[3]


This minor planet was named after Imprinetta Gent, wife of the discoverer. The naming was proposed by the discoverer and by Gerrit Pels, who computed its orbit. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108).[2]


  1. ^ a b c d "JPL Small-Body Database Browser: 1165 Imprinetta (1930 HM)" (2017-03-30 last obs.). Jet Propulsion Laboratory. Retrieved 6 September 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1165) Imprinetta". Dictionary of Minor Planet Names – (1165) Imprinetta. Springer Berlin Heidelberg. p. 98. doi:10.1007/978-3-540-29925-7_1166. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g "LCDB Data for (1165) Imprinetta". Asteroid Lightcurve Database (LCDB). Retrieved 6 September 2017.
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Archived from the original on 16 August 2017. Retrieved 6 September 2017.
  5. ^ a b c d 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 6 September 2017.
  6. ^ a b c d 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 6 September 2017.
  7. ^ a b c d 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. Retrieved 6 September 2017.
  8. ^ 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 6 September 2017.
  9. ^ a b c d 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. Retrieved 6 September 2017.
  10. ^ a b c d 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 6 September 2017.
  11. ^ 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.
  12. ^ a b Monson, Andy; Kipp, Steven (December 2004). "Corrigendum: Rotational periods of asteroids 1165 Imprinetta, 1299 Mertona 1645 Waterfield, 1833 Shmakova, 2313 Aruna, and (13856) 1999 XZ105". The Minor Planet Bulletin. 31 (4): 97. Bibcode:2004MPBu...31...97M. ISSN 1052-8091. Retrieved 6 September 2017.
  13. ^ a b Menke, John L. (September 2005). "Lightcurves and periods for asteroids 471 Papagena, 675 Ludmilla, 1016 Anitra, 1127 Mimi, 1165 Imprinetta, 1171 Rustahawelia, and 2283 Bunke". The Minor Planet Bulletin. 32 (3): 64–66. Bibcode:2005MPBu...32...64M. ISSN 1052-8091. Retrieved 6 September 2017.
  14. ^ 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 6 September 2017.
  15. ^ a b "1165 Imprinetta (1930 HM)". Minor Planet Center. Retrieved 6 September 2017.
  16. ^ a b 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.

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