spelt trek wrong, anyway, done some maths.. :)

Give a pancam height of 1.54m - the range at which an object will be visible give it's height ( i.e. the Victoria Crater Rim ) and the size, in pixels of the width of Victoria

Height
(m)
· Visible from (km)
· Pixel Width of 720mCrater

0
· 3.272067477
· 784.1396336

1
· 4.272067477
· 598.5309912

2
· 5.272067477
· 484.2006555

3
· 6.272067477
· 406.6256405

4
· 7.272067477
· 350.5106437

5
· 8.272067477
· 308.0227713

6
· 9.272067477
· 274.7311111

7
· 10.27206748
· 247.9393127

8
· 11.27206748
· 225.9119368

9
· 12.27206748
· 207.4811894

10
· 13.27206748
· 191.8322704

12
· 15.27206748
· 166.690241

14
· 17.27206748
· 147.3765993

16
· 19.27206748
· 132.0747416

18
· 21.27206748
· 119.6520804

20
· 23.27206748
· 109.3657505

22
· 25.27206748
· 100.7082371

24
· 27.27206748
· 93.32100295

26
· 29.27206748
· 86.94355646

28
· 31.27206748
· 81.38207891

30
· 33.27206748
· 76.48937466

35
· 38.27206748
· 66.49526091

40
· 43.27206748
· 58.81111227

45
· 48.27206748
· 52.71900462

50
· 53.27206748
· 47.77059696

60
· 63.27206748
· 40.22021104

70
· 73.27206748
· 34.73086028

80
· 83.27206748
· 30.5599797

90
· 93.27206748
· 27.28347645

100
· 103.2720675
· 24.64152855

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