Lowell Observatory offers these tools to assist with asteroid observation planning. The orbital solutions used within these tools are independently calculated from Minor Planet Center observations. Asteroid.lowell.edu is in the process of upgrading and in a Beta status. Functionality should generally be available. However, some tools may experience bugs. If a bug is particularly important, please direct concerns to asteroid@lowell.edu.

Target Generation

Generate an observationally prioritized list of asteroids based on the capabilities of the user's instrument and other generic requirements.
View a list of asteroids whose orbits are very near the orbit of one or more of the major planets. These asteroids can have rapidly changing orbits due to perturbations by the large planets.
View lists LONEOS asteroid observations.
View a pre-selected list of asteroids in need of observation.

Observational Aids

Generate filterable list of objects up on a given night
Generate an asteroid ephemeris by selecting the asteroid by name, the start time, duration and interval.
Search by any asteroid identifier and return all possible identifiers
View a summary of observing nights on large aperature (>2m) facilities allocated to observers who study near-Earth objects
Build a chart which indicates when an asteroid is observable. The observability calculation is based on the user's instrument, and location and the asteroid's declination, uncertainty, solar elongation, magnitude, and galactic latitude.
Calculate the dates for a 'small' number of observations that will result in the numbering of an asteroid. The calculation is based on the user's instrument and location. Build a chart showing the ephemeris uncertainty after each suggested observation.
Build a chart showing the position of a selected asteroid and the surrounding stars. The motion vector and the line of variation are indicated.
Build a plot that depicts the position of stars and asteroids within a defined region.

Catalog Access

View a list of asteroid orbital parameters and physical properties. The orbital parameters are updated daily.
Create a list of stars that meet various positional and brightness criteria. The base catalogs include USNO-A2.0, USNO-SA2.0, and PPM.


December, 23, 2015 Ephemeris and Designation table now reference a JSON object which can be called directly. Minor UI and consistency updates.
December, 7, 2015 Added phase column option to UpObjects. Fixes sort by asteroid number on UpObjects. Optimized some code.
December, 1, 2015 New tool: NEO observing calendar. A publicly available summation of NEO observations.
November, 27, 2015 Fixed issue with negative phase angle object being improperly filtered on UpObjecs page
November, 18, 2015 Asteph object identifier links bring to prepopulated ephemeris page
November, 03, 2015 Fixed Asteph ephemerides. They used to be wrong. Now they are correct.
October, 29, 2015 Asteph timestep/duration combinations fixed. Can go past 100 steps. Email links fixed.
October, 22, 2015 UI updates to tables. Errors can be displayed in Asteph table.
October, 01, 2015 Public Beta Website Release
July 30, 2015 Landing page tiles

These tools and projects are supported by NASA NEOO grant NNX14AN 82G awarded to the MANOS project.

This page is based upon work supported by the National Science Foundation under Grant Number 1202680 awarded to N. Moskovitz.

The research and computing needed to generate astorb.dat were funded principally by NASA grant NAG5-4741, and in part by the Lowell Observatory endowment. astorb.dat may be freely used, copied, and transmitted provided attribution to Dr. Edward Bowell and the aforementioned funding sources is made. Hypertext links to this WWW site are welcome.

Lowell Observatory | MANOS | Flagstaff, AZ