1925 Franklin-Adams

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1925 Franklin-Adams
001925-asteroid shape model (1925) Franklin-Adams.png
Franklin-Adams modeled from its lightcurve
Discovery [1]
Discovered by H. van Gent
Discovery site Johannesburg Obs.
(Leiden Southern Station)
Discovery date9 September 1934
Designations
(1925) Franklin-Adams
Named after
 John Franklin Adams
(British astronomer) [2]
1934 RY ·1969 EP1
1970 KH ·1974 KK
main-belt [1] [3]  ·(middle)
background [4] [5]
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc 85.14 yr (31,098 d)
Aphelion 2.9989 AU
Perihelion 2.1046 AU
2.5517 AU
Eccentricity 0.1752
4.08 yr (1,489 d)
11.630°
0° 14m 30.48s / day
Inclination 7.7371°
113.47°
242.08°
Physical characteristics
Mean diameter
8.864±0.114  km [6] [7]
2.978±0.002  h [5] [8] [lower-alpha 1]
0.356±0.054 [6] [7]
S (assumed) [9]
12.0 [7]
12.1 [1] [3]

    1925 Franklin-Adams (prov. designation: 1934 RY) is a stony background asteroid from the central regions of the asteroid belt, approximately 8.9 kilometers (5.5 miles) in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. [1] The bright asteroid has a short rotation period of less than 3 hours. [5] It was named after British amateur astronomer John Franklin Adams (1843–1912). [2]

    Contents

    Orbit and classification

    Franklin-Adams is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [4] It orbits the Sun in the central asteroid belt at a distance of 2.1–3.0  AU once every 4 years and 1 month (1,489 days; semi-major axis of 2.55 AU). Its orbit has an eccentricity of 0.18 and an inclination of 8° with respect to the ecliptic. [3] The body's observation arc begins with its official discovery observation at Johannesburg. [1]

    Naming

    This minor planet named after British amateur astronomer John Franklin Adams (1843–1912), who created one of the earliest detailed, photographic atlases of the complete night sky (the Franklin-Adams plates or charts). [10] He later donated his 25-cm Franklin-Adams Star Camera (Franklin-Adams photographic refractor) to the Johannesburg Observatory, which lead to the discovery of Proxima Centauri. [2] The official naming citation was published by the Minor Planet Center on 20 December 1983 ( M.P.C. 8402). [11] Asteroid 982 Franklina, discovered by South African astronomer Harry Edwin Wood at Johannesburg was also named after him.

    Physical characteristics

    Franklin-Adams is an assumed stony S-type asteroid with a very high albedo of more than 0.3 (see below). [5] [9]

    Rotation period and poles

    In January 2005, a rotational lightcurve of Franklin-Adams was obtained from photometric observations by French amateur astronomer René Roy. Lightcurve analysis gave a rotation period of 3.082 hours with a brightness amplitude of 0.23 magnitude ( U=2 ). [12] In March 2010, photometry at the Palomar Transient Factory in California gave a period of 2.979 with an amplitude of 0.32 magnitude ( U=2 ). [13] In January 2013, American astronomer Brian Warner obtained the so-far best rated lightcurve. [lower-alpha 1] It gave a period of 2.978 hours and an amplitude of 0.25 magnitude ( U=3 ). [8]

    In 2016, an international study modeled a lightcurve with a concurring period of 2.978301 hours and found a spin axis of (277.0°, 57.0°) and (66.0°, 48.0°) in ecliptic coordinates (λ, β) ( U=n.a. ). [14]

    Diameter and albedo

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Franklin-Adams measures 8.864 kilometers in diameter and its surface has an unusually high albedo of 0.356, [6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 11.30 kilometers based on an absolute magnitude of 12.1. [9]

    Notes

    1. 1 2 Lightcurve plot of 1925 Franklin-Adams with a period of 2.978±0.002 and an amplitude of 0.25 ± 0.02 mag. Observations at the Palmer Divide Observatory by B. D. Warner (2013)

    Related Research Articles

    <span class="mw-page-title-main">982 Franklina</span>

    982 Franklina is a background asteroid from the outer regions of the asteroid belt, approximately 32 kilometers in diameter. It was discovered on 21 May 1922, by South African astronomer Harry Edwin Wood at the Union Observatory in Johannesburg. The uncommon A/Ld-type asteroid has a rotation period of at least 16 hours. It was named after British amateur astronomer John Franklin Adams (1843–1912).

    1313 Berna, provisional designation 1933 QG, is a background asteroid and synchronous binary system from the Eunomian region in the central asteroid belt, approximately 14 kilometers in diameter. It was discovered on 24 August 1933, by Belgian astronomer Sylvain Arend at the Uccle Observatory in Belgium. The assumed S-type asteroid has a longer-than average rotation period of 25.5 hours and is likely elongated in shape. It was named for the Swiss capital of Bern. The discovery of an 11-kilometer-sized companion was announced in February 2004.

    1575 Winifred, provisional designation 1950 HH, is a stony Phocaea asteroid and slow rotator from the inner regions of the asteroid belt, approximately 9.5 kilometers in diameter.

    1074 Beljawskya, provisional designation 1925 BE, is a Themistian asteroid from the outer region of the asteroid belt, approximately 48 kilometers in diameter.

    3567 Alvema, provisional designation 1930 VD, is a dark asteroid from the middle region of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle, on 15 November 1930. It was named after the discoverer's three great-granddaughters Aline, Vérionique and Martine.

    <span class="mw-page-title-main">3544 Borodino</span> Asteroid

    3544 Borodino (prov. designation: 1977 RD4) is a stony background asteroid from the inner regions of the asteroid belt, approximately 9 kilometers (5.6 miles) in diameter. It was discovered on 7 September 1977, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The likely elongated S-type asteroid has a rotation period of 5.44 hours. It was named for the Russian village of Borodino where the Battle of Borodino took place.

    1609 Brenda, provisional designation 1951 NL, is a stony asteroid from the central region of the asteroid belt, approximately 28 kilometers in diameter. It was discovered on 10 July 1951, by South African astronomer Ernest Johnson at the Johannesburg Observatory in South Africa, and named after his granddaughter, Brenda.

    <span class="mw-page-title-main">1335 Demoulina</span>

    1335 Demoulina, provisional designation 1934 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1934, the asteroid was named after Prof. Demoulin, a Belgian astronomer at Ghent University. It has a slower-than average spin rate of nearly 75 hours.

    <span class="mw-page-title-main">1328 Devota</span>

    1328 Devota, provisional designation 1925 UA, is a dark background asteroid from the outermost regions of the asteroid belt, approximately 56 kilometers in diameter. It was discovered on 21 October 1925, by Russian–French astronomer Benjamin Jekhowsky at the Algiers Observatory in North Africa. The asteroid was named after Argentine astronomer Fortunato Devoto.

    1267 Geertruida, provisional designation 1930 HD, is a carbonaceous background asteroid from the inner regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by astronomer Hendrik van Gent at Johannesburg Observatory in 1930, the asteroid was later named after Geertruid Pels, sister of Dutch astronomer Gerrit Pels.

    <span class="mw-page-title-main">1356 Nyanza</span>

    1356 Nyanza, provisional designation 1935 JH, is a dark asteroid from the background population of the outer asteroid belt, approximately 63 kilometers in diameter. It was discovered on 3 May 1935, by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the former Nyanza Province in Kenya, Africa.

    1426 Riviera, provisional designation 1937 GF, is a bright asteroid from the central regions of the asteroid belt, approximately 16 kilometers in diameter. Discovered by Marguerite Laugier at the Nice Observatory in 1937, the asteroid was later named for the Côte d'Azur, also known as French Riviera.

    <span class="mw-page-title-main">1430 Somalia</span>

    1430 Somalia, provisional designation 1937 NK, is a stony background asteroid from the central regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 5 July 1937, by astronomer Cyril Jackson at the Union Observatory in Johannesburg. It was named for the African country of Somalia.

    7776 Takeishi, provisional designation 1993 BF, is a background asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 20 January 1993, by Japanese astronomer Takeshi Urata at the Nihondaira Observatory in Japan. The assumed S-type asteroid has a rotation period of 8.9 hours. It was named after Japanese amateur astronomer Masanori Takeishi.

    2019 van Albada, provisional designation 1935 SX1, is a stony Florian asteroid and former spacecraft target from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 28 September 1935, by Dutch astronomer Hendrik van Gent at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. The asteroid was later named after Gale Bruno van Albada.

    1660 Wood, provisional designation 1953 GA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was named after British–South African astronomer Harry Edwin Wood.

    1922 Zulu, provisional designation 1949 HC, is a carbonaceous asteroid in a strongly unstable resonance with Jupiter, located in the outermost regions of the asteroid belt, and approximately 20 kilometers in diameter. It was discovered on 25 April 1949, by South African astronomer Ernest Johnson at Union Observatory in Johannesburg, and named for the South African Zulu people.

    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.

    6181 Bobweber, provisional designation 1986 RW, is a stony asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 6 September 1986, by American astronomer Eleanor Helin at the U.S. Palomar Observatory in California, and named after astronomer Robert Weber.

    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.

    References

    1. 1 2 3 4 5 "1925 Franklin-Adams (1934 RY)". Minor Planet Center. Retrieved 8 February 2020.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1925) Franklin-Adams". Dictionary of Minor Planet Names . Springer Berlin Heidelberg. p.  155. doi:10.1007/978-3-540-29925-7_1926. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 "JPL Small-Body Database Browser: 1925 Franklin-Adams (1934 RY)" (2019-10-31 last obs.). Jet Propulsion Laboratory . Retrieved 8 February 2020.
    4. 1 2 "Asteroid 1925 Franklin-Adams – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 8 February 2020.
    5. 1 2 3 4 "Asteroid 1925 Franklin-Adams". Small Bodies Data Ferret. Retrieved 8 February 2020.
    6. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv: 1109.4096 . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68 . Retrieved 21 March 2017.
    7. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
    8. 1 2 Warner, Brian D. (July 2013). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2013 January - March". The Minor Planet Bulletin. 40 (3): 137–145. Bibcode:2013MPBu...40..137W. ISSN   1052-8091 . Retrieved 9 June 2017.
    9. 1 2 3 "LCDB Data for (1925) Franklin-Adams". Asteroid Lightcurve Database (LCDB). Retrieved 8 February 2020.
    10. ↑ "The Internet Encyclopedia of Science". David Darling. Archived from the original on 22 March 2017.
    11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 9 June 2017.
    12. ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (1925) Franklin-Adams". Geneva Observatory . Retrieved 9 June 2017.
    13. ↑ Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv: 1504.04041 . Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75 . Retrieved 9 June 2017.
    14. ↑ Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M.; et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics. 586: 24. arXiv: 1510.07422 . Bibcode:2016A&A...586A.108H. doi:10.1051/0004-6361/201527441.
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