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Wildrik Botjes Planetarium
Physics & Astronomy Department

Images: Venus Tables

Our set of Venus images and the corresponding movie track the appearance of Venus as viewed from Earth beginning in January 2001. The details of Venus' position and of our imaging for each frame are described in the two tables below.

The first table gives the details of Venus' position: the angular diameter of the planet, its distance from earth, its angular distance from the sun, its illumination phase, its brightness, and the elevation above the horizon at the time of the observation. The angular diameter is in units of arcseconds, a sixtieth of a sixtieth of a degree. The distance is in astronomical units (AU), which are defined by the average distance between the Sun and the Earth: 93 million miles. The brightness is in magnitudes, a logarithmic scale in which a change of 0.1 magnitudes is a change of about 10% in brightness, with more negative numbers being brighter.

date diameter distance elongation phase brightness elevation
of 2001 arcsecond AU degrees percent magnitude degrees
January 19 25.0 0.667 47.1 49.8 -4.44 41.0
February 12 33.9 0.491 43.8 34.7 -4.60 50.3
February 20 38.2 0.437 40.9 28.4 -4.62 54.8
March 1 44.0 0.379 35.8 20.4 -4.61 44.6
March 9 49.8 0.335 29.0 12.9 -4.53 19.2
March 21 57.2 0.291 15.5 3.6 -4.24 58.8
March 27 59.1 0.282 8.9 1.2 -4.05 10.5
April 4 58.2 0.287 11.3 1.9 -4.11 53.3
April 13 53.4 0.313 22.0 7.3 -4.35 40.9
April 23 46.1 0.362 31.9 16.0 -4.50 35.7
April 30 41.7 0.400 36.3 21.6 -4.52 49.1
May 8 36.1 0.462 40.9 29.2 -4.51 44.0
May 19 30.6 0.546 44.1 37.6 -4.45 43.7
May 30 26.4 0.633 45.5 44.7 -4.37 50.5
June 8 23.6 0.705 45.8 50.0 -4.30 32.8
June 25 19.8 0.841 44.9 58.3 -4.19 60.1
Sept. 11 12.2 1.373 30.5 85.2 -3.96 52.8

The second table gives the time of each observation, the duration of each exposure, the filter used, and the name of the observer (Calvin students and faculty).

date time exp. filter observer
of 2001 EST sec . .
January 19 4:39 pm 0.20 U L. Molnar
February 12 4:42 pm 0.15 U P. Schrock
February 20 4:05 pm 0.15 V A. Vanden Heuvel
March 1 5:30 pm 0.11 I A. Vanden Heuvel
March 9 7:31 pm 0.20 U L. Molnar
March 21 2:10 pm 0.11 H alpha L. Molnar
March 27 6:34 pm 0.11 nH alpha P. Schrock
April 4 11:57 am 0.11 H alpha L. Molnar
April 13 9:48 am 0.11 H alpha L. Molnar & P. Ammar
April 23 8:48 am 0.11 H alpha D. Haarsma
April 30 12 noon 0.11 nH alpha P. Ammar
May 8 9:27 am 0.11 H alpha L. Molnar
May 19 11:47 am 0.11 H alpha L. Molnar
May 30 10:59 am 0.11 H alpha L. Molnar
June 8 1:13 pm 0.20 H alpha A. Vanden Heuvel
June 25 10:25 am 0.11 H alpha L. Molnar
Sept. 11 12:42 pm 0.11 H alpha L. Molnar


Content updated 11/29/03