| Discovery [1] | |
|---|---|
| Discovered by | P. Wild |
| Discovery site | Zimmerwald Obs. |
| Discovery date | 17 April 1968 |
| Designations | |
| (1830) Pogson | |
Named after | Norman Pogson [2] (English astronomer) |
| 1968 HA ·1926 GW 1929 EE ·1942 EC1 1945 BB ·1953 RE1 1955 FX ·1955 GE 1961 AC ·1969 QM 1971 BJ ·1972 NA1 1972 OC ·1972 OD | |
| main-belt [1] [3] ·( inner ) Flora [4] [5] · binary [5] [6] [7] | |
| Orbital characteristics [3] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 92.52 yr (33,794 d) |
| Aphelion | 2.3117 AU |
| Perihelion | 2.0652 AU |
| 2.1884 AU | |
| Eccentricity | 0.0563 |
| 3.24 yr (1,182 d) | |
| 342.96° | |
| 0° 18m 15.84s / day | |
| Inclination | 3.9540° |
| 147.45° | |
| 334.96° | |
| Known satellites | 1 (D: 2.52 km, P: 24.24 h) [5] [6] [7] |
| Physical characteristics | |
Mean diameter | 7.710±0.669 km [8] [9] 8.284±0.116 km [10] 8.35 km [11] |
| 2.56999±0.00004 h [12] | |
| 0.2188 [11] 0.2361 [10] 0.274 [8] [9] | |
| Tholen = S [4] SMASS = S [4] [5] B–V = 0.910 [4] U–B = 0.500 [4] | |
| 12.45 [1] [3] 12.61 [8] [10] | |
1830 Pogson, provisional designation 1968 HA, is a stony Florian asteroid and an asynchronous binary system from the inner regions of the asteroid belt, approximately 8 kilometers (5 miles) in diameter. It was discovered on 17 April 1968, by Swiss astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland. [1] The S-type asteroid has a rotation period 2.6 of hours. [5] It was named for English astronomer Norman Pogson. The discovery of its 2.5-kilometer sized companion was announced in May 2007. [6] [7]
According to a HCM-analysis by David Nesvorný, Pogson is a member of the Flora family ( 402 ), [4] a giant asteroid clan and the largest family of stony asteroids in the asteroid belt. [5] [13] It has also been grouped into the Augusta family ( list ) by Zappalà, while for Milani and Knežević, who don't recognize the Florian clan as a family, Pogson is a non-family asteroid from the main belt's background population. [14]
It orbits the Sun in the inner asteroid belt at a distance of 2.1–2.3 AU once every 3 years and 3 months (1,182 days; semi-major axis of 2.19 AU). Its orbit has an eccentricity of 0.06 and an inclination of 4° with respect to the ecliptic. [3] The asteroid was first observed as 1926 GW at Simeiz Observatory in April 1926. The body's observation arc begins with its observation as 1929 EE at Heidelberg Observatory in March 1929, or 39 years prior to its official discovery observation at Zimmerwald. [1]
This minor planet was named after English astronomer Norman Pogson (1829–1891), inventor of the modern astronomical magnitude scale. At the Radcliffe and Madras observatories, he discovered eight asteroids, including 42 Isis and 67 Asia. [2] The official naming citation was published by the Minor Planet Center on 15 October 1977 ( M.P.C. 4236). [15] The lunar crater Pogson was also named in his honor. [2]
In the Tholen and SMASS classification, Pogson is a common, stony S-type asteroid. [3]
In April 2007, a rotational lightcurve of Pogson was obtained from photometric observations by an international collaboration of Australian, European and American astronomers, namely, David Higgins , Petr Pravec, Peter Kušnirák, Julian Oey and Donald Pray. Lightcurve analysis gave a rotation period of 2.5702±0.0001 hours with a brightness variation of 0.12 magnitude ( U=3 ). [7] In the following month, a more refined period of 2.56990±0.00004 hours with the same amplitude was measured by Petr Pravec ( U=3 ). [12]
Additional period determinations were made by Melissa Dykhuis and collaborators (2.5698 h) at the Calvin College Observatory ( H62 ) during 2008 ( U=2+ ), [16] and by Pierre Antonini (2.5699 h) and Julian Oey (2.604 h) in March 2013 ( U=3-/2 ). [17] [18]
During the photometric observation in 2007, it was also revealed, that Pogson is an asynchronous binary system with a minor-planet moon in its orbit. [7] The mutual eclipse and occultation events showed that the companion, provisionally designated S/2007 (1830) 1, orbits its primary every 24.24 hours. [7] [12] Based on a secondary-to-primary diameter ratio of 0.32 or larger, Johnston's archive estimates a diameter of 2.52 kilometers for the satellite, separated by 8 kilometers from its primary. [6]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Pogson measures between 7.7 and 8.35 kilometers in diameter and its surface has an albedo between 0.2188 and 0.274. [8] [9] [10] [11] The Collaborative Asteroid Lightcurve Link adopts the result from Petr Pravec's revised WISE-data, [11] that is, an albedo of 0.2188 and a diameter of 8.35 kilometers based on an absolute magnitude of 12.659. [5]
2006 Polonskaya (provisional designation: 1973 SB3) is a stony Flora asteroid and asynchronous binary system from the inner regions of the asteroid belt, approximately 5 kilometers (3.1 miles) in diameter. It was discovered on 22 September 1973, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula, and later named after Ukrainian astronomer Elena Kazimirtchak-Polonskaïa. Its one-kilometer-sized satellite was discovered by an international collaboration of astronomers in November 2005.
1717 Arlon, provisional designation 1954 AC, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 8.5 kilometers in diameter.
6084 Bascom, provisional designation 1985 CT, is a binary Phocaea asteroid from the inner regions of the asteroid belt, approximately 6.3 kilometers in diameter. It was discovered on 12 February 1985, by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory in California. It is named after American geologist Florence Bascom. Its satellite measures approximately 2.3 kilometers and has an orbital period of 43.51 hours.
4029 Bridges, provisional designation 1982 KC1, is a stony asteroid and binary system from the middle regions of the asteroid belt, approximately 8 kilometers in diameter.
1806 Derice, provisional designation 1971 LC, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. Discovered on 13 June 1971, at the Bickley site of the Perth Observatory in Western Australia, it was the first discovery of a minor planet ever made in Oceania. The asteroid was named after the wife of Dennis Harwood, staff member at Bickley.
1736 Floirac, provisional designation 1967 RA, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8.7 kilometer in diameter.
1722 Goffin, provisional designation 1938 EG, is a stony asteroid from the central region of the asteroid belt, approximately 10.3 kilometers in diameter.
4951 Iwamoto, provisional designation 1990 BM, is a stony, synchronous binary asteroid and slow rotator from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered on 21 January 1990, by Japanese astronomers Yoshikane Mizuno and Toshimasa Furuta at Kani Observatory in Japan.
8116 Jeanperrin, provisional designation 1996 HA15, is a Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 4.8 kilometers (3 miles) in diameter. It was discovered on 17 April 1996, by Belgian astronomer Eric Elst at the La Silla Observatory in northern Chile. The likely stony S-type asteroid has a rotation period of 3.62 hours and a nearly round shape. It was named for French physicist and Nobel laureate Jean Baptiste Perrin. A minor-planet moon, a third the size of its primary, was discovered in 2007.
3868 Mendoza, provisional designation 4575 P-L is a stony Vestian asteroid and binary system from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 24 September 1960, by astronomers Cornelis Johannes van Houten, Ingrid van Houten-Groeneveld and Tom Gehrels at Palomar Observatory.
15350 Naganuma, provisional designation 1994 VB2, is a stony background asteroid from the inner regions of the asteroid belt, approximately 4.3 kilometers (2.7 miles) in diameter. It was discovered on 3 November 1994, by Japanese astronomers Yoshio Kushida and Osamu Muramatsu at the Yatsugatake South Base Observatory. The likely S-type asteroid has a rotation period of 2.5 hours. It was named for the town of Naganuma in northern Japan.
1979 Sakharov, provisionally designated 2006 P-L, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 4.5 kilometers in diameter. It was discovered during the Palomar–Leiden survey in 1960, and named after Russian physicist Andrei Sakharov.
1405 Sibelius, provisional designation 1936 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The asteroid was named after composer Jean Sibelius.
2815 Soma, provisional designation 1982 RL, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 15 September 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona, in the United States. It is named for the mechanical puzzle Soma cube.
4786 Tatianina, provisional designation 1985 PE2, is a bright background asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 3.4 kilometers (2.1 miles) in diameter. It was discovered on 13 August 1985, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. It was named after Tatiana Somova, a friend of the discoverer. The E-/Xc-subtype has a short rotation period of 2.9 hours. Its sub-kilometer minor-planet moon was discovered on 20 March 2006 and announced the following month.
2478 Tokai, provisionally designated 1981 JC, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 4 May 1981, by Japanese astronomer Toshimasa Furuta at Tōkai Observatory, Japan. The asteroid was named after the city of Tōkai.
2195 Tengström, provisional designation 1941 SP1, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 27 September 1941, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland, and named for Swedish geodesist Erik Tengström.
3982 Kastelʹ, provisional designation 1984 JP1, is a Florian asteroid and a suspected binary system from the inner regions of the asteroid belt, approximately 6.9 kilometers in diameter.
(6265) 1985 TW3 (provisional designation 1985 TW3) is a background asteroid and binary system from the inner regions of the asteroid belt. It was discovered on 11 October 1985, by astronomer by T. F. Fric and Richard Gilbrech at the Palomar Observatory in California. It is the only minor-planet discovery for these two astronomers. The stony L-type asteroid measures approximately 5 kilometers (3.1 miles) in diameter and has a rotation period of 2.7 hours. Its 1.2-kilometer sized minor-planet moon was discovered in July 2007 and announced the following month.
10208 Germanicus, provisional designation 1997 QN1, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 3.5 kilometers in diameter.
