Comet's naming method

1995 years ago, the comet is in accordance with the annual found that the order of arrangement of the English lower case. 1994, discovered a comet 1994a, infer that, after a period of observation to determine the comet's orbit and fix it over the priorities of the perihelion of the comet, came in the years after the Roman numerals Ⅰ, Ⅱ (This number is usually two years after the end of the year to compile). Shoemaker? Levy 9 comet number for 1993e and 1994 Ⅹ.
In addition to the number, some comets are usually discoverer surname named. Comet can labeled three discoverer's name, the English name of the Shoemaker Levy 9 comet Shoemaker-Levy 9.
From 1995, the nomenclature of the International Astronomical Union Reference asteroid, comet ID law in two weeks for the unit, in alphabetical order. I and Z do not have removed all of the letters of the English alphabetical order of the remaining 24, such as the first half of January as A, January second half for B thus infer to December second half for Y.
And then
  Comet
The comet discovered 1,2,3 .. digital serial arrangement of the same month and a half. Furthermore, in order to facilitate the identification comet status of the serial numbers marked:
A / might as asteroids
P / confirm return of a more short-period comet P in front of the table number on a periodic comet (as Halley's Comet 1P/1982 U1 or referred 1P also)
C / long-period comets (more than 200-year cycle, such as Haile Bopp Comet C/1995 O1)
X / not yet calculated the orbital elements of the comet
D / the longer regression or comet may have disappeared (such as Shoemaker? Levy 9 comet D / 1993 F2)
Attached S / satellite of the newly discovered planet
If the comet is broken, split into more than the nucleus, together with the number and then-A,-B .. to distinguish each nucleus. Return of the comet aspects, such as the comet again observed regression in P / (or may be the D /) mark again before plus a serial number given by the IAU Minor Planet Center, in order to avoid the return of the comet. For example, the following tag: 1P/1682 Q1 = 1P/1910 A2 = 1P/1982 U1 = 1P/Halley = Halley's Comet in Halley's Comet.