IC Discovery Statistics

Dr. Wolfgang Steinicke

December 14, 2009

This table presents the discovery statistics for the IC. It is based on the Historic IC. The columns are explained below (1...10 are called "status", which is roughly an object type). The 58 discoverers are presented in detail on the observers page (note that 3 persons - Al Sufi, Bellamy and W. Parsons - are not the very discoverers, but mentioned by Dreyer). The last row gives the sums of the columns. The individual sums add to 5386, the number of entries in the original IC.

 Observer

D

IC

Ex

1

2

3

4

5

6

7

8

9

10

Aitken

1

1

1

 

 

1

 

 

 

 

 

 

Al Sufi

1

 

 

 

 

 

 

 

 

 

 

 

 

Bailey

5

1

1

 

1

 

 

 

 

 

 

 

Barnard

157

129

117

74

37

3

3

 

13

12

4

8

Bellamy

1

 

 

 

 

 

 

 

 

 

 

 

Bidschof

2

2

1

1

 

 

 

 

 

 

 

1

 

Bigourdan

322

264

86

83

2

 

1

 

11

3

53

116

51

Burnham

22

22

22

22

 

 

 

 

 

1

 

 

 

Clemens

 

1

1

 

 

 

1

 

 

 

 

 

 

Coddington

1

1

1

1

 

 

 

 

 

 

 

 

 

de Cheseaux

1

2

2

 

 

 

2

 

 

 

 

 

 

Denning

18

18

18

15

 

1

2

 

 

 

 

 

 

Dunlop

 

10

10

2

1

 

7

 

 

 

 

 

 

Engelhardt

1

1

 

 

 

 

 

 

 

 

 

1

 

Espin

21

18

13

 

6

1

6

 

 

 

 

4

1

Finlay

5

4

2

2

 

 

 

 

 

 

1

1

1

Fleming

39

46

39

2

15

22

 

 

 

 

5

5

2

Frost

454

446

435

431

3

1

 

 

 

4

3

2

9

Gale

1

1

1

 

 

1

 

 

 

 

 

 

 

Herschel J.

1

1

1

1

 

 

 

 

 

 

 

 

 

Herschel W.

 

1

1

 

1

 

 

 

 

 

 

 

 

Howe

64

58

57

57

 

 

 

 

 

1

4

 

1

Innes

13

13

6

5

 

 

1

 

 

 

 

6

1

Javelle

1431

1364

1341

1338

2

1

 

 

 

15

49

13

10

Keeler

7

7

6

6

 

 

 

 

 

 

 

 

1

Kobold

37

37

34

34

 

 

 

 

 

 

 

3

 

Lacaille

2

4

4

 

 

 

4

 

 

 

 

 

 

Leavenworth

 

3

2

2

 

 

 

 

1

 

1

 

 

Lunt

6

7

7

5

 

2

 

 

 

 

 

 

 

Marth

1

1

 

 

 

 

 

 

 

 

 

1

 

Messier

1

1

1

 

 

 

1

 

 

 

 

 
Mitchell

1

1
1
                  

Muller

 

13

12

12

 

 

 

 

 

 

1

 

1

Palisa

4

1

1

1

 

 

 

 

 

 

3

 

 

Parrish

 

5

2

2

 

 

 

 

 

 

 

1

2

Parsons W.

9

 

 

 

 

 

 

 

 

 

 

 

 

Pechüle

3

3

3

2

 

 

1

 

 

 

 

 

 

Pickering

17

2

2

 

1

 

1

 

 

 

 

 

 

Roberts

33

34

31

24

7

 

 

 

 

 

 

3

 

Safford

47

39

38

35

1

1

1

 

 

 

5

 

1

Schaeberle

1

1

1

 

1

 

 

 

 

 

 

 

 

Schwassmann

172

149

67

67

 

 

 

 

1

3

18

67

14

Skinner

 

3

3

3

 

 

 

 

 

 

 

 

 

Spitaler

63

64

55

53

1

 

 

1

 

 

2

9

 

Stewart

672

653

597

582

3

1

5

6

 

6

9

17

39

Stone

29

8

7

7

 

 

 

 

 

 

1

1

 

Stoney B.

 

6

6

6

 

 

 

 

 

 

2

 

 

Stratonov

1

1

1

 

1

 

 

 

 

 

 

 

 

Swift E.

 

21

20

20

 

 

 

 

 

 

1

1

 

Swift L.

585

450

392

390

1

 

1

1

33

78

11

46

Tempel

1

1

 

1

 

 

 

 

 

Thome

5

5

1

 

 

 

1

 

 

 

 

2

2

Todd

 

2

2

2

 

 

 

 

 

 

1

 

 

Trouvelot

 

1

1

1

 

 

 

 

 

 

 

 

Voigt

 

3

3

3

 

 

 

 

 

 

 

 

 

Webb

 

1

1

 

 

 

1

 

 

 

 

 

 

Wilson

3

3

3

3

 

 

 

 

 

 

 

 

 

Wolf

1127

1112

687

675

12

 

 

 

9

 

12

382

34

 

5386

5046

4148

3969

97

36

38

8

23

79

261

651

224

 

Explanation of columns

Column
Meaning
Observer Name of discoverer
D Number of discoveries as given by Dreyer (original IC)
IC Actual number of discoveries
Ex Number of existing objects (status 1 ...6 as listed below)
1
 Galaxy
2
 Galactic nebula, Supernova remnant
3
 Planetary nebula
4
 Open cluster
5
 Globular cluster
6
 Part of galaxy (e.g. bright HII regions)
7
 Object already in the IC
8
 Object already in the NGC
9
 Star(s), star group
10
 Not found (maybe non existent)