1P to 50P
| Designation | Name | Discovered | Last T | Next T | Period |
|---|---|---|---|---|---|
| 1P | Halley | 240 BC | 1986 | 2061 | 76.01 |
| 2P | Encke | 1786 | 2007 | 2010 | 3.30 |
| 3D | Biela | 1772 | 1852 | Broke up | 6.62 |
| 4P | Faye | 1843 | 2006 | 2014 | 7.55 |
| 5D | Brorsen | 1846 | 1879 | Lost | 5.46 |
| 6P | d'Arrest | 1851 | 2008 | 2015 | 6.54 |
| 7P | Pons-Winnecke | 1819 | 2008 | 2015 | 6.36 |
| 8P | Tuttle | 1790 | 2008 | 2021 | 13.61 |
| 9P | Tempel 1 | 1867 | 2005 | 2011 | 5.52 |
| 10P | Tempel 2 | 1873 | 2005 | 2010 | 5.47 |
| 11P | Tempel-Swift-LINEAR | 1869 | 2001 | 2014 | 6.37 |
| 12P | Pons-Brooks | 1812 | 1954 | 2024 | 70.92 |
| 13P | Olbers | 1815 | 1956 | 2024 | 69.56 |
| 14P | Wolf | 1884 | 2009 | 2017 | 8.74 |
| 15P | Finlay | 1886 | 2008 | 2014 | 6.50 |
| 16P | Brooks 2 | 1889 | 2008 | 2014 | 6.14 |
| 17P | Holmes | 1892 | 2007 | 2014 | 6.88 |
| 18D | Perrine-Mrkos | 1896 | 1968 | lost? | 6.72 |
| 19P | Borrelly | 1904 | 2008 | 2015 | 6.85 |
| 20D | Westphal | 1852 | 1913 | Lost? | 61.86 |
| 21P | Giacobini-Zinner | 1900 | 2005 | 2012 | 6.62 |
| 22P | Kopff | 1906 | 2009 | 2015 | 6.44 |
| 23P | Brorsen-Metcalf | 1847 | 1989 | 2059 | 70.54 |
| 24P | Schaumasse | 1911 | 2001 | 2009 | 8.25 |
| 25D | Neujmin 2 | 1916 | 1927 | Lost | 5.43 |
| 26P | Grigg-Skjellerup | 1902 | 1997 | 2008 | 5.11 |
| 27P | Crommelin | 1818 | 1984 | 2011 | 27.41 |
| 28P | Neujmin 1 | 1913 | 2002 | 2021 | 18.19 |
| 29P | Schwassmann-Wachmann 1 | 1927 | 2004 | 2019 | 14.65 |
| 30P | Reinmuth 1 | 1928 | 2002 | 2010 | 7.32 |
| 31P | Schwassmann-Wachmann 2 | 1929 | 2002 | 2010 | 8.72 |
| 32P | Comas Solá | 1926 | 2005 | 2014 | 8.78 |
| 33P | Daniel | 1909 | 2008 | 2016 | 8.10 |
| 34D | Gale | 1927 | 1938 | Lost | 10.99 |
| 35P | Herschel-Rigollet | 1788 | 1939 | 2092 | 154.91 |
| 36P | Whipple | 1933 | 2003 | 2011 | 8.51 |
| 37P | Forbes | 1929 | 2005 | 2011 | 6.35 |
| 38P | Stephan-Oterma | 1867 | 1980 | 2018 | 37.71 |
| 39P | Oterma | 1942 | 2002 | 2023 | 19.49 |
| 40P | Väisälä 1 | 1939 | 2004 | 2014 | 10.83 |
| 41P | Tuttle-Giacobini-Kresak | 1858 | 2006 | 2011 | 5.42 |
| 42P | Neujmin 3 | 1929 | 2004 | 2015 | 10.70 |
| 43P | Wolf-Harrington | 1924 | 2004 | 2010 | 6.45 |
| 44P | Reinmuth 2 | 1947 | 2008 | 2015 | 7.07 |
| 45P | Honda-Mrkos-Pajdusakova | 1948 | 2006 | 2011 | 5.25 |
| 46P | Wirtanen | 1948 | 2008 | 2013 | 5.44 |
| 47P | Ashbrook-Jackson | 1948 | 2009 | 2017 | 8.34 |
| 48P | Johnson | 1949 | 2004 | 2011 | 6.96 |
| 49P | Arend-Rigaux | 1951 | 2005 | 2011 | 6.61 |
| 50P | Arend | 1951 | 2007 | 2016 | 8.26 |