John Broughton


see

John Broughton is an Australian amateur astronomer and artist. He is among the most prolific discoverers of minor planets worldwide, credited by the Minor Planet Center with more than 1,000 discoveries made between 1997 and 2008. His observations are done at Reedy Creek Observatory in Queensland, Australia.
In 2002, Broughton was one of five astronomers to be awarded a "Gene Shoemaker NEO Grant" by the Planetary Society to support his work on near-Earth asteroids. The money enabled the purchase of a CCD camera for use initially on a 10" SCT and later on a 20" f/2.7 automated telescope he designed and constructed, with first light occurring 10 April 2004.
Asteroid 24105 Broughton was named in his honour in 2005, and he later won an Australian national award the 2008 Page Medal.

Discoveries and research

He is the discoverer of four near-Earth objects, two of which are potentially hazardous asteroids. Discovered 11 April 2004 on the first full night of operations with the 20" telescope, Apollo asteroid is one of only 157 known kilometer-size PHAs and the largest such discovery made by a non-professional astronomer. The short-period comet 513P/Broughton was discovered in October, 2005, followed nine months later by the hyperbolic comet C/2006 OF2 at a distant 7.7 AU from the sun and more than two years from reaching its perihelion.
In 2003, he began observing asteroid occultations by taking trailed CCD exposures and measuring the resulting dips in brightness. Subsequently, he developed methods and applications to facilitate the observation, timing and analysis. By 2010, he had switched to using sensitive video cameras, and began designing telescopes better suited to multi-station field work than what is commercially available, culminating in collapsible alt-alt telescopes of moderate size, compact enough to take anywhere in the world in standard airline baggage. In 2011, he formulated a method to derive asteroid dimensions by integrating the results of separate occultations. The tables are periodically updated and now include over 500 asteroids.

List of discovered minor planets

8749 Beatles3 April 1998
8958 Stargazer23 March 1998
9241 Rosfranklin10 August 1997
11196 Michanikos22 January 1999
11365 NASA23 March 1998
11425 Wearydunlop18 June 1999
12113 Hollows29 July 1998
12542 Laver10 August 1998
13298 Namatjira15 September 1998
14621 Tati22 October 1998
15092 Beegees15 March 1999
15495 Bogie17 February 1999
15550 Sydney31 March 2000
15947 Milligan2 January 1998
16046 Gregnorman5 May 1999
16155 Buddy3 January 2000
16260 Sputnik9 May 2000
17023 Abbott7 March 1999
17024 Costello15 March 1999
17038 Wake26 March 1999
17058 Rocknroll13 April 1999
17059 Elvis15 April 1999
17078 Sellers24 April 1999
17166 Secombe17 June 1999
17269 Dicksmith3 June 2000

27 July 1998
29 July 1998
22754 Olympus26 November 1998
23032 Fossey3 December 1999
23774 Herbelliott26 June 1998
24450 Victorchang29 August 2000
18 August 1998
25058 Shanegould25 August 1998
13 October 1998
13 October 1998
15 October 1998
14 November 1998
15 November 1998
5 March 2000
14 March 2000
3 March 2001
22 October 1998
3 April 2000
2 June 2000
18 April 2001
23 April 2001
1 July 2001
1 July 1998
22 July 1998
10 March 1999

29 July 2000
12 July 2001
5 August 1997
2 January 1998
7 March 1999
19 April 1999
13 May 1999
7 July 1999
15 August 1999
27 May 2000
24 June 2000
23 July 2000
23 July 2000
28 August 2000
13 May 1999
11 July 1999
13 August 1999
29 July 2000
30 July 2000
9 August 2000
5 March 1998
13 September 1998
13 July 1999
9 August 1999
10 August 1999

13 October 1998
15 October 1998
22 December 1998
17 July 1999
4 August 1999
4 August 1999
2 June 2000
6 June 2000
23 August 2000
19 March 2001
24 April 1998
15 October 1998
24 April 1999
5 August 2002
25 August 1997
22 July 1998
29 July 1998
10 August 1998
24 August 1998
28 October 1998
11 April 2000
6 June 2000
22 June 2000
24 February 2001
22 March 2001

5 March 2000
15 March 2000
6 May 2000
11 May 2000
24 June 2000
27 June 2000
21 August 2000
23 August 2000
19 July 2001
21 July 2001
17 August 2001
19 August 2001
21 May 1998
22 May 1998
19 April 1999
14 May 1999
18 June 1999
20 June 1999
13 July 1999
18 July 1999
10 August 1999
4 June 2000
23 June 2000
27 June 2000
5 July 2000

24 August 1998
15 September 1998
15 October 1998
18 July 1999
11 August 1999
15 August 1999
6 March 2000
19 March 2001
16 April 2001
19 April 2001
23 July 2001
12 May 2002
9 June 2002
18 June 2002
22 August 2003
25 August 1997
22 July 1998
28 July 1998
20 June 1999
19 July 1999
12 September 1999
19 March 2001
20 March 2001
19 July 2001
16 August 2001

31 August 2000
19 June 2003
26 February 1998
13 August 1999
7 November 1999
7 November 1999
3 April 2000
27 May 2000
29 May 2000
2 June 2000
29 June 2000
29 June 2000
5 July 2000
30 July 2000
28 August 2000
30 April 2003
1 June 2003
5 June 2003
4 June 2003
9 June 2003
18 July 2004
9 August 2004
10 August 2004
12 August 2004
13 August 2004

10 June 2002
5 July 2002
6 July 2002
14 July 2002
14 July 2002
15 July 2002
16 July 2002
16 July 2002
10 August 2002
14 August 2002
29 April 2003
2 May 2003
10 May 2003
24 May 2003
24 May 2003
20 June 2003
29 June 2003
29 June 2003
3 July 2003
20 July 2003
24 July 2003
24 July 2003
24 July 2003
27 July 2003
29 July 2003

15 September 1999
27 June 2000
14 May 2002
23 April 2003
29 April 2003
22 May 2003
26 May 2003
6 June 2003
3 July 2003
17 July 2003
25 July 2003
27 July 2003
27 July 2003
31 July 2003
29 July 2003
1 August 2003
2 August 2003
20 August 2003
22 August 2003
24 August 2003
25 August 2003
30 August 2003
28 June 2004
8 July 2004
8 July 2004

2 May 2001
5 July 2002
15 July 2002
21 May 2003
13 July 1999
30 July 2000
22 May 2001
21 July 2001
17 August 2001
17 August 2001
18 June 2002
8 July 2002
16 July 2002
31 July 2002
1 August 2002
14 August 2002
7 July 2003
22 April 2004
10 May 2004
12 May 2004
12 May 2004
16 July 2004
3 May 2005
16 May 2005
28 May 2005

24 May 2003
7 July 2003
10 June 2004
8 July 2004
20 September 2005
23 July 2000
16 August 2001
3 May 2003
10 May 2004
22 June 2004
27 June 2004
12 July 2004
19 July 2004
20 July 2004
12 August 2004
28 July 2005
3 May 2003
25 August 2003
17 July 2004
6 August 2004
6 August 2004
24 July 2003
8 July 2004
17 July 2004
6 August 2004

11 August 2007
10 June 2002
5 August 2002
23 May 2003
3 July 2003
24 July 2003
27 July 2003
28 July 2003
30 April 2005
3 May 2006
5 May 2006
5 August 2007
10 August 2007
19 April 2002
7 August 2002
6 July 2003
26 July 2003
25 April 2004
31 May 2005
5 June 2005
24 April 2006
3 May 2006
1 July 2006
18 April 2002
28 July 2003

28 July 2005
6 August 2005
2 August 2005
6 August 2005
24 August 2005
20 July 2006
3 July 2003
27 July 2003
21 April 2004
30 April 2004
13 May 2004
17 May 2004
18 June 2004
6 August 2004
28 May 2005
3 June 2005
4 June 2005
2 July 2005
7 July 2005
10 July 2005
10 July 2005
13 July 2005
14 July 2005
26 July 2005
26 July 2005

21 May 2003
23 May 2003
24 May 2003
5 June 2003
7 June 2003
7 June 2003
4 July 2003
20 July 2003
30 July 2003
31 July 2003
20 August 2003
25 August 2003
10 June 2004
17 June 2004
25 June 2004
12 July 2004
17 July 2004
19 July 2004
20 July 2004
6 August 2004
8 August 2004
9 August 2004
13 August 2004
19 August 2004
20 August 2004

6 August 2007
7 August 2007
17 July 2003
26 July 2003
31 July 2003
26 April 2006
26 April 2006
17 July 2006
24 July 2007
4 August 2007
6 August 2007
9 August 2007
10 August 2007
10 August 2007
2 July 2003
29 July 2003
2 August 2003
20 August 2003
1 April 2005
1 June 2005
10 August 2005
1 May 2006
17 July 2006
22 July 1998
12 July 2002

22 August 2004
7 July 2005
2 May 2005
6 August 2005
12 April 2004
10 May 2004
21 August 2004
16 May 2005
28 May 2005
10 July 2005
24 August 2005
5 April 2003
26 July 2003
20 August 2003
23 April 2004
12 July 2004
20 July 2004
21 August 2004
27 July 2005
13 May 2004
27 June 2004
14 July 2004
11 August 2004
10 June 2005
9 July 2005

20 August 2004
12 July 2007
13 July 2007
15 July 2007
4 August 2007
7 August 2007
9 August 1999
2 June 2000
4 July 2003
26 August 2003
2 September 2003
6 August 2004
29 May 2005
2 April 2006
24 April 2006
26 April 2006
21 May 2006
1 June 2006
29 July 2006
20 July 2007
18 July 2007
21 July 2007
4 August 2007
31 July 2003
4 September 2003

4 August 2007
12 May 2002
5 June 2003
27 July 2003
1 August 2003
27 May 2004
25 June 2004
21 July 2004
29 May 2005
28 May 2005
4 June 2005
5 June 2005
7 August 2005
2 April 2006
28 July 2003
22 June 2004
29 July 2005
6 August 2005
8 April 2003
22 May 2003
26 July 2003
20 August 2003
22 August 2003
10 May 2004
16 May 2004

24 April 2006
26 April 2006
23 May 2006
23 May 2006
29 May 2006
26 July 2006
19 August 2006
4 August 2002
27 August 2003
2 September 2003
14 July 2004
6 July 2005
7 July 2005
15 July 2005
26 July 2005
28 July 2005
30 July 2008
23 July 2000
6 July 2005
7 August 2005
24 April 2006
12 June 2007
7 August 2002
22 June 2004
25 June 2004

25 August 2006
18 July 2007
28 April 2008
2 August 2008
9 August 2008
8 August 2008
26 July 2003
24 August 2003
21 July 2004
8 August 2004
1 June 2005
26 April 2006
4 August 2007
25 August 2008
27 July 2003
21 April 2006
3 May 2006
25 August 2008
7 July 2007
20 August 2003
14 July 2004
6 August 2004
1 June 2005
29 May 2006
30 July 2006

23 May 2007
9 July 2007
10 July 2007
21 July 2007
21 July 2007
25 July 2007
7 August 2007
7 August 2007
9 August 2007
6 August 2004
20 August 2004
10 July 2005
16 July 2005
29 May 2006
15 August 2006
6 August 2007
7 August 2007
19 June 2003
12 April 2004
17 May 2004
26 April 2006
16 August 2006
11 July 2007
12 July 2007
7 August 2007

16 August 2001
20 May 2003
22 May 2003
25 July 2003
2 September 2003
13 May 2004
14 June 2004
21 July 2004
7 August 2004
7 July 2005
7 August 2008
7 July 2007
21 April 2004
28 July 2005
11 August 2005
19 August 2006
18 August 2006
18 August 2006
29 July 2003
27 July 2005
4 May 2006
28 July 2003
30 May 2006
17 May 2004
24 June 2006

9 April 2003
12 July 2004
20 July 2004
7 August 2004
9 August 2004
7 August 2007
28 July 2005
24 July 2007
7 July 2007
29 July 2003
22 September 2003
15 April 2005
3 May 2006
3 May 2006
18 July 2004
21 August 2004
20 September 2005
23 May 2006
28 July 2003
27 July 2005
15 August 2006
5 May 2006
13 July 2007
22 May 2003
22 April 2004

17 May 2004
14 July 2004
19 August 2004
24 May 2006
8 July 2007
10 August 2007
28 May 2005
6 August 2007
9 August 2004
22 August 2004
30 August 2003
21 July 2004
18 July 2004
21 July 2004
7 August 2008
21 July 2004
10 August 2007
22 August 2004
29 July 2003
25 August 2005
28 May 2006
31 July 2003
12 May 2004
18 August 2006
13 August 2004

8 July 2004
27 July 2003
3 May 2006
27 July 2003
8 June 2007
10 July 2005
8 August 2007
16 May 2005
28 May 2005
6 July 2007