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Celestial calendar - Comets
Celestial calendar

COMETS

In 2004 the 17 periodical comets will return to perihelions. Two of them may be visible with the naked eye.

      

 

Name

Perihelion
Time

Period
(years)

Number
of appearance

Perihelion
Distance (AU)

Eccentricity

Magnitude
(max)

58P/Jackson - Neujmin

Jan. 10

8.27

5

1.39

0.66

16.5m

C/2003 A2 (Gleason)

Jan. 16

-

1

11.43

1.01

19.2m

40P/Vaisala 1*

Jan. 23

10.8

6

1.80

0.63

14.5m

C/2003 E1 (NEAT)

Feb. 13

50.8

1

3.25

0.76

17.8m

C/2003 H1 (LINEAR)

Feb. 23

 

1

2.24

1.0

10.6m

43P/Wolf - Harrington*

Mar. 18

6.45

9

1.58

0.54

12.0m

C/2002 L9 (NEAT)

Apr. 6

-

1

7.03

1.00

16.4m

88P/Howell

Apr. 13

5.50

5

1.37

0.56

10.3m

C/2002 T7 (LINEAR)

Apr. 23

-

1

0.61

1.00

0.27m !

104P/Kowal 2

May 10

6.18

3

1.40

0.59

13.7m

C/2001 Q4 (NEAT)

May 16

-

1

0.96

1.00

2.45m !

103P/Hartley 2

May 18

6.40

3

1.04

0.70

9.8m

P/1996 R2 (Lagerkvist)

June 7

7.39

1

2.62

0.31

16.7m

29P/Schwassmann - Wachmann 1

July 11

14.7

5

5.72

0.04

13.1m

42P/Neujmin 3

July 16

10.7

4

2.01

0.58

18.5m

121P/Shoemaker - Holt 2

Sept. 2

8.01

2

2.65

0.34

16.8m

120P/Mueller 1

Sept. 30

8.43

2

2.75

0.34

17.2m

48P/Johnson

Oct. 12

6.96

8

2.31

0.37

16.3m

130P/McNaught - Hughes

Oct. 23

6.67

2

2.10

0.41

15.8m

78P/Gehrels 2

Oct. 27

7.22

4

2.01

0.46

10.8m

131P/Mueller 2

Dec. 18

7.07

2

2.42

0.34

15.8m

111P/Helin - Roman - Crockett

Dec. 27

8.12

2

3.47

0.14

18.5m

* Jupiter comet family.

 

Glossary

Astronomical Unit (AU):

middle distance from Earth to Sun, equal 149.6 millions km.

Eccentricity:

a parameter that specifies the shape of a conic section; one of the standard elements used to describe an elliptic orbit.

Perihelion::

the point at which a body in orbit around the Sun most closely approaches the Sun.

Period:

the interval of time required to complete one revolution in an orbit or one cycle of a periodic phenomenon, such as a cycle of phases.

 

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