slideshow 1 slideshow 2 slideshow 3 slideshow 4 slideshow 5 slideshow 6

You are here

PSI Staff Asteroids

H = absolute magnitude
Peri = argument of perihelion (deg)
Node = longitude of ascending node (deg)
i = inclination (deg)
e = eccentricity
a = semimajor axis (AU)

Asteroid Name H a e i Node Peri Discoverer(s) Citation
2882 Tedesco 11.9 3.153 0.193 0.292 314.844 7.859 Bowell Named in honor of Edward F. Tedesco, planetary scientist at the Jet Propulsion Laboratory [now at PSI], who has made wide-ranging contributions to minor-planet science, including studies of rotational brightness variation, pole and shape determination, and the compositional structure of the belt. He is currently engaged in analyzing observations of minor planets by the Infrared Astronomical Satellite.
3197 Weissman 11.6 2.666 0.180 16.405 111.653 313.478 Bowell Named in honor of Paul R. Weissman, cometary physicist at the Jet Propulsion Laboratory who has made studies of the dynamics of the Oort cloud and of the thermal properties of cometary nuclei.
3341 Hartmann 12.6 3.033 0.230 10.452 142.29 0 234.834 Bowell Named in honor of William K. Hartmann, senior scientist at the Planetary Science Institute in Tucson. Hartmann's contributions to solar system research have ranged from work on planetary cratering rates and the origin of the Moon to studies of comets and Trojan minor planets. He is the author of several textbooks on astronomy and planetary science, as well as popular books on space exploration. Hartmann is also a renowned space artist whose paintings depict scenes predicted by modern research. Citation written by R. P. Binzel at the request of the discoverer.
3439 Lebofsky 12.5 2.745 0.135 4.744 7.986 284 .020 Bowell Named in honor of Larry A. Lebofsky, planetary scientist at the Lunar and Planetary Laboratory of the University of Arizona, Tucson [now at PSI]. Lebofsky was the first to find chemically-bound water and the presence of ice in the regoliths of minor planets and has been a major contributor to the development of minor-planet thermal models. He has also played an important role in the extraction of minor-planet data from IRAS infrared observations. He has undertaken related laboratory spectral studies on icy condensates and the comparison of minor planets with cometary dust, planetary satellites, and Pluto. Citation prepared by J.S. Lewis.
3507 Vilas 11.3 3.139 0.153 3.248 88.409 184.931 Bowell Named in honor of Faith Vilas, planetary scientist at the Johnson Manned Space Center in Houston [now Director of the MMT Observatory in Tucson, Arizona]. Vilas has used high-resolution visual and near-infrared spectral measurements to search for compositional trends among outer-belt minor planets and to investigate the mineralogy of Mercury. She designed and built the coronograph/spectrograph that was used to image the planetary disk around Beta Pictoris and is currently evauating the hazard presented by Earth-orbiting debris for future manned missions, including NASA's Space Station. Citation prepared by M. V. Sykes, with assistance from N. Lebofsky and E. Roemer.
3638 Davis 11.4 3.014 0.074 11.309 109.135 172.286< /td> Bowell Named in honor of Donald R. Davis, senior scientist at the Planetary Science Institute in Tucson. Davis has made fundamental theoretical and experimental contributions to research on the collisional evolution of minor planets. With colleagues, he was the first to propose the 'gravitationally bound rubble pile' model for large minor planets. Another of his research interests is infrared searching for intramercurial bodies. Citation written by R. P. Binzel at the request of the discoverer.
3639 Weidenschilling 13.7 2.401 0.100 2.197 222.709 182.318 Bowell Named in honor of Stuart J. Weidenschilling, research scientist at the Planetary Science Institute in Tucson. Weidenschilling is a noted expert in the study of the origin of the solar system, and his research has also included collisional evolution of minor planets. He and colleagues are conducting a program of 'photometric geodesy' to model the shapes of large, rapidly rotating minor planets from extensive lightcurve observations. Citation written by R. P. Binzel at the request of the discoverer.
4438 Sykes 11.5 3.171 0.248 13.294 56.983 292.718 Bowell Named in honor of Mark V. Sykes, planetary scientist at the Steward Observatory of the University of Arizona, Tucson. Sykes was the first to suggest that the dust bands discovered in data from the Infrared Astronomical Satellite (IRAS) see planet (3728)) were due to the catastrophic disruptions of small asteroids and comets. He has also discovered several additional dust bands, a second type of dust trail, and identified parent comets responsible for some of the IRAS dust trails. Citation provided by E. F. Tedesco at the request of the discoverer.
6756 Williamfeldman 13.9 2.682 0.181 3.646 253.193 304.643 Helin & Bus William C. Feldman (b. 1940) is the father of planetary neutron spectroscopy. His ingeniously designed instruments found evidence for ice at the lunar poles, Mercury's north pole, and in the high-latitude subsurface of Mars. He is loved for his open and generous collaborations and unrelenting enthusiasm for science.
6812 Robertnelson 13.2 3.130 0.115 0.878 185.702 80.575 Helin & Bus Robert M. Nelson (b. 1943) has advanced the understanding of spectrophotometric and angular scattering properties of planetary regoliths, served on Voyager and Cassini instrument teams, and was the Project Scientist for Deep Space 1. He is a strong advocate for scientist privacy rights.
6813 Amandahendrix 12.8 3.132 0.111 2.579 268.327 327.990 Helin & Bus Amanda R. Hendrix (b. 1968) has used UV spectroscopy to expand our knowledge of icy satellites, the Moon, asteroids, Mars and Io, by revealing surface compositions, weathering processes and radiation products. She was Cassini Deputy Project Scientist, worked on LRO LAMP, and assessed Europa missions.
6944 Elaineowens 14.3 2.316 0.138 7.660 122.285 174.449< /td> Bus Elai ne Owens (b. 1947) was administrative coordinator at the Planetary Science Institute for over 25 years. Her ability to deal with a challenging group of scientists in the ever-increasing demands of a complex world while maintaining a pleasant and efficient persona made her essential to the organization.
7807 Grier 12.8 3.172 0.097 13.235 200.898 54.47 6 Bus Jennifer Grier (b. 1968) is involved in numerous aspects of planetary science education and research. Her research has focused on planetary surface ages via crater counting and radiometric dating. In 2006 she became the Education Officer for the AAS Division of Planetary Sciences.
8068 Vishnureddy 13.4 2.7538 0.1996 3.391 157.469 257.663 Bus Vishnu Reddy (b. 1978) is a research professor at the University of North Dakota and a visiting scientist at the Max Planck Institute for Solar System Research. He specializes in the spectroscopic study of minor planets and is currently analyzing Vesta's composition in support of the Dawn mission.
85015 Gaskell  14.6 2.301 0.042 6.610 180.163 20.4 43 Bus Robert Gaskell (b. 1945) is a Senior Scientist at the Planetary Science Institute. He is known for the development of stereophotoclinometry software tools, which are used to determine the shape and topography of solar system objects and for spacecraft navigation using landmark tracking.
9211 Neese 14.8 2.252 0.151 2.405 14.741 266.185 Spacewatch Trained in stellar astronomy, Carol Lynn Neese (b. 1958) turned to solar system studies in 1992, joining the Planetary Science Institute in Tucson, making physical studies of minor planets and archiving data from groundbased and spacecraft communities into the Small Bodies Node of the NASA Planetary Data System.
9285 Le Corre 13.4 2.911 0.057 1.140 313.807 88.398 Bus Lucille Le Corre (b. 1983) is an associate researcher at the Planetary Science Institute in Tucson. Her work includes creating combined geologic and composition maps of planetary satellite and asteroid surfaces using radar, spectroscopic and imaging data.
11010 Artemieva 13.5 2.386 0.135 1.829 19.063 112.779 CSS Natal ia A. Artemieva (b. 1959) is a Russian planetary scientist known for her theoretical work on impacts of interplanetary bodies into planets and planetary satellites.
12309 Tommygrav 14.1 2.718 0.309 0.720 321.355 112 .520 Spacewatch Tommy Grav (b. 1973) earned a Ph.D. in astronomy at the University of Oslo in 2004, in collaboration with the Harvard-Smithsonian Center for Astrophysics, and started work as Junior Scientific Researcher with Pan-STARRS. He is an experienced observer of transneptunian objects and outer satellites of the giant planets.
12871 Samarasinha 14.1 2.270 0.172 5.318 112.731 2 96.200 LONEOS Beginning with his demonstration of the excited rotational state of 1P/Halley, Nalin H. Samarasinha (b. 1958), of the National Optical Astronomy Observatories, Tucson, [now PSI] has carried out many studies of the dynamical evolution of cometary nuclei and the related dynamical processes of dust in cometary comae.
17195 jimrichardson 14.0 3.218 .1213 6.061 154.530 273.059 Lowell James Richardson (b. 1961) has calculated models of the shaking of asteroids by impacts for his thesis research at the University of Arizona. As a side venture, he has provided simulation tools for reproducing the phenomenology seen by the Deep Impact mission, and these have been invaluable in planning observing sequences.
17857 Hsieh 13.02 2.695 0.205 13.229 50.950 271.379 Lowell Henry H. Hsieh (b. 1978) has studied the nature of the comet-like Themis-family minor planet (7968) = 133P/Elst-Pizarro and has surveyed the main belt for examples of similar transition objects.
20897 Deborahdomingue 14.5 2.770 0.027 15.590 118.906 2 02.331 LONEOS Deborah L. Domingue (b. 1963) works at Johns Hopkins University Applied Physics Laboratory. Domingue has worked on the NEAR space mission and is deputy project scientist for the MESSENGER mission. She is an expert in photometry and Hapke theory and in the analysis of small-body remote sensing data.
21458 Susank 14.7 2.330 0.067 4.630 173.838 284.2 55 LONEOS Susan D. Benecchi (née Kern; b. 1977) is currently a postdoctoral researcher at the Space Telescope Science Institute, Baltimore. She specializes in binary transneptunian objects and has a strong interest in science education.
21496 Lijianyang 14.5 2.685 0.198 8.168 154.806 164 .334 LONEOS Jianyang Li (b. 1976), University of Maryland, has studied the surface light-scattering properties of minor planets and comets. He has discovered a correlation of photometric properties with outgassing on comet 19P/Borrelly; and, on (1) Ceres, spatially varying strong ultraviolet absorption by an unidentified species.
21774 O'Brien 15.9 2.339 0.084 6.654 155.792 267. 239 LONEOS David P. O'Brien (b. 1976) is a planetary scientist at the Planetary Science Institute, Tucson. He studies collisional evolution of main-belt minor planets, cratering on (951) Gaspra and other objects, as well as primordial sculpting of the main belt during the planetary accretion process.
24412 Ericpalmer 12.6 3.149 0.055 16.962 183.727 184.247 LONEOS Eric E. Palmer (b. 1968) is a research scientist at the Planetary Science Institute in Tucson. His research focuses on the presence and stability of water and other volatile compounds on asteroid and planetary satellite surfaces, and their detection through spectroscopic techniques.
24994 Prettyman 15.1 2.363 0.1135 6.476 103.806 211.17 8 LONEOS Thomas H. Prettyman (b. 1964), a senior scientist with the Planetary Science Institute, led the gamma ray and neutron detector investigation on the Dawn mission to Vesta, revealing in situ a composition consistent with the HED meteorite class as well as an unexpected presence of hydrogen.
55108 Beamueller 14.2 3.013 0.104 10.691 8.521 6 7.600 Tucker Beatrice E. A. Mueller (b. 1959) of the Planetary Science Institute in Tucson, studies small bodies of the solar system. She specializes in photometry and rotational studies of small bodies and was one of the first to discover the ultra-red colors of the centaur (5145) Pholus.
264474 Rogerclark 16.3 3.056 0.055 0.652 58.785 268.353 SKADS Roger Clark (b. 1953) made fundamental discoveries about solid surfaces on bodies from Earth to Saturn. He applied imaging spectroscopy to map minerals on these bodies on numerous NASA missions and applied these methods to assess the 9/11 disaster and determine oil leakage from the Gulf spill.
363115 Chuckwood 16.2 3.149 0.174 1.079 29.653 313.435 SKADS Charles (Chuck) Wood (b. 1942) made fundamental insights into the role of cratering and volcanism in shaping planetary surfaces. He tirelessly promoted science education through numerous books, popular articles and the internet. His development of education programs introduced many students to science.
16702 Buxner 15.3 2.707 0.1273 2.617 5.539 101.347 Spacewatch Sanlyn R. Buxner (b. 1978) is known for her work in space science education and public outreach, including curriculum development, teacher workshops, and program evaluation. Her focus is on how science research experiences empower teachers and students and improve their science understanding.
9027 Graps 14.7 2.300 0.2028 5.1400 66.017 286.434 Mrkos Amara Graps (b. 1961) is a planetary scientist who concentrates on asteroids and comets, but has worked on every planet in the Solar System. She has analyzed data from many missions, such as New Horizons, Rosetta, Cassini and Voyager 2. She is Chief Scientist of Deep Space Industries Latvia.
22410 Grinspoon 15.6 2.568 0.0242 3.5273 12.1671 121.746 Spacewatch David Grinspoon (b. 1959), an astrobiologist at the Southwest Research Institute, won the 2006 Carl Sagan Medal and wrote the award-winning book Lonely Planets.
8140 Hardersen 13.3 2.7326 0.0691 6.8040 220.632 194.973 Bus Paul S. Hardersen (b. 1965) is a professor and observatory director in the Department of Space Studies at the University of North Dakota. His research includes mineralogical analysis of minor-planet surfaces using telescopic measurements in the near-infrared.
16972 Neish 13.8 2.540 0.1827 9.7697 83.518 182.774 LINEAR Catherine D. Neish (b. 1981) is a professor at the University of Western Ontario who studies Titan, the Moon and Venus using orbital radar. Previously known by the moniker Katie Dot, she is an avid scuba diver, a champion for social justice, and mother to Penelope.
9525 Amandasickafoose 14.3 2.4588 0.0994 7.4570 329.660 62.137 Bus Amanda A. Sickafoose Gulbis (b. 1975) is an astronomer at the South African Large Telescope. Her research contributions span from theoretical studies of dust properties on small bodies, to stellar occultations of Kuiper Belt objects, to astronomical instrumentation.
8796 Sonnett 15.5 2.2350 0.0810 2.1708 222.011 244.879 Bus Sarah Sonnett (b. 1984) is a postdoctoral fellow at the Jet Propulsion Laboratory. Through light curve analysis, she studies the rotational properties and shapes of small bodies throughout the solar system. She also analyzes asteroid survey images to search for main-belt comets.
129324 Johnweirich 16.7 2.3501 0.2031 3.1420 56.6465 242.419 Mt.Lemmon Survey John R. Weirich (b. 1979) is a researcher at the Planetary Science Institute. Currently his research focus is testing and preparing code that will be used to build a shape model of asteroid Bennu for the OSIRIS-REx Asteroid Sample Return Mission. He also conducts age dating on impact-melted meteorites.
7272 Darbydyar 12.6 2.7792 0.1019 9.6387 30.2691 208.172 Z. Vavrova M. Darby Dyar (b. 1958) is a professor at Mount Holyoke College who specializes in Mössbauer spectroscopy of terrestrial and extraterrestrial material. Data from her laboratory have been vital for understanding Mössbauer measurements by the Mars Exploration Rovers.


  • 2882 Tedesco is a member of the Themis family.
  • 3341 Hartmann has been observed in the S3OS2 survey and has a taxonomic classification of T.
  • 3638 Davis is a member of the Eos family.
  • 4438 Sykes was observed by IRAS and has an albedo of 0.07 and an effective diameter of 24.89 km.
  • 3507 Vilas is a member of the Themis family and shows evidence of hydration.

PSI is a Nonprofit 501(c)(3) Corporation, and an Equal Opportunity and Affirmative Action Employer
Corporate Headquarters: 1700 East Fort Lowell, Suite 106 * Tucson, AZ 85719-2395 * 520-622-6300 * FAX: 520-622-8060
Copyright © 2021 . All Rights Reserved.