How Can We Help?
You are here:
< Back
![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1e/S0484.4.jpg/300px-S0484.4.jpg)
Non-periodic comets are seen only once. They are usually on near-parabolic orbits that will not return to the vicinity of the Sun for thousands of years, if ever.
Periodic comets usually have elongated elliptical orbits, and usually return to the vicinity of the Sun after a number of decades.
The official names of non-periodic comets begin with a "C"; the names of periodic comets begin with "P" or a number followed by "P". Comets that have been lost or disappeared have names with a "D". Comets whose orbit has not been determined are designated with a "X" prefix.
Lists
- List of comets by type
- List of comets visited by spacecraft
- List of comets with no meaningful orbit
- List of Great Comets
- List of Halley-type comets
- List of hyperbolic comets
- List of long-period comets
- List of near-parabolic comets
- List of numbered comets
- List of periodic comets
See also
External links
- Bright Comet Chronicles
- 1994 Resolution about comet names
- Comets currently above mag. 12 - Heavens-Above
On Earth |
| ||||
---|---|---|---|---|---|
On Mars | |||||
On Jupiter |
| ||||
Lists | |||||
See also |
Categories
-
Annuals36
-
Bulbs, Corms & Tubers41
-
Ferns27
-
Fruits3
-
Garden Plants23
-
Grasses26
-
Herb17
-
Insects1
-
Mammals1
-
Midwest Native Plants0
-
Northeast Native Plants112
-
Perennials123
-
Rose1
-
Shrubs47
-
Trees112
-
Tropical Plants53
-
Upland Birds5
-
Vines18
-
Viola Tricolor1
-
Water Gardening & Plants9
-
Waterfowl0
-
Wetland Birds0
-
Wetland Plants4
-
Wildbirds172
-
Wildflowers1
-
Woodland Plants29
Table of Contents
Recent Comments