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F r o m W i k i p e d i a , t h e f r e e e n c y c l o p e d i a
T h e p r i n t a b l e v e r s i o n i s n o l o n g e r s u p p o r t e d a n d m a y h a v e r e n d e r i n g e r r o r s . P l e a s e u p d a t e y o u r b r o w s e r b o o k m a r k s a n d p l e a s e u s e t h e d e f a u l t b r o w s e r p r i n t f u n c t i o n i n s t e a d .
2608 Seneca , provisional designation 1978 DA , is a stony asteroid and sub-kilometer near-Earth object of the Amor group , approximately 0.9 kilometers in diameter. It was discovered on 17 February 1978, by German astronomer Hans-Emil Schuster at ESO 's La Silla Observatory in northern Chile, and named after Roman philosopher Seneca .[3] [4]
Orbit
Seneca orbits the Sun at a distance of 1.1–4.0 AU once every 3 years and 12 months (1,457 days). Its orbit has an eccentricity of 0.57 and an inclination of 15° with respect to the ecliptic .[1]
The body's observation arc begins with its official discovery observation in 1978, as no precoveries were taken, and no prior identifications were made.[4]
Close approaches
Seneca has an Earth minimum orbital intersection distance of 0.1321 AU (19,800,000 km ), which corresponds to 51.5 lunar distances .[1] On 22 March 2062, it will pass 0.254 AU (38,000,000 km ) from the Earth.[8]
Physical characteristics
In the Tholen taxonomy, Seneca is a stony S-type asteroid .[1]
Photometry
In March 1978, a photometric observations taken by Degewij and Lebofsky at the Lunar and Planetary Laboratory , Arizona, using a 154-cm reflector, gave a rotational lightcurve with a rotation period of 8 hours and a brightness amplitude of 0.4 (0.5) magnitude (U=2 ).[6]
Radiometry
In addition, radiometric observations by L. and M. Lebofsky with the 71-cm reflector gave a mean-diameter of 1.0± 0.3 kilometers and albedo of 0.15± 0.03 .[6]
Diameter and albedo
The Minor Planet Center classifies Seneca as an object larger than 1 kilometer ("1+ KM Near-Earth Object"),[4] while Collaborative Asteroid Lightcurve Link derives an albedo of 0.20 and a diameter of 0.9 kilometers based on an absolute magnitude of 17.59.[5] In 1994, astronomer Tom Gehrels published a diameter of 0.9 kilometers with an albedo of 0.21 in his Hazards Due to Comets and Asteroids .[1]
Naming
This minor planet was named after Roman philosopher and statesman Lucius Annaeus Seneca (c. 4 BC – AD 65), also known as "Seneca the Younger" or simply "Seneca".[3] The approved naming citation was published by the Minor Planet Center on 8 April 1982 (M.P.C. 6835 ).[9] The lunar crater Seneca was also named in his honor.[3]
References
^ "Seneca" . Oxford English Dictionary (Online ed.). Oxford University Press . (Subscription or participating institution membership required.)
^ a b c d Schmadel, Lutz D. (2007). "(2608) Seneca". Dictionary of Minor Planet Names – (2608) Seneca . Springer Berlin Heidelberg . p. 213. doi :10.1007/978-3-540-29925-7_2609 . ISBN 978-3-540-00238-3 .
^ a b c d "2608 Seneca (1978 DA)" . Minor Planet Center . Retrieved 26 March 2017 .
^ a b c d e "LCDB Data for (2608) Seneca" . Asteroid Lightcurve Database (LCDB). Retrieved 26 March 2017 .
^ a b c d e f g Degewij, J.; Lebofsky, L.; Lebofsky, M. (March 1978). "1978 CA and 1978 DA" . IAU Circ . 3193 (3193): 1. Bibcode :1978IAUC.3193....1D . Retrieved 26 March 2017 .
^ Schuster, H. E.; Surdej, A.; Surdej, J. (September 1979). "Photoelectric observations of two unusual asteroids - 1978 CA and 1978 DA" . Astronomy and Astrophysics Supplement Series . 37 : 483–486. Bibcode :1979A&AS...37..483S . Retrieved 26 March 2017 .
^ "JPL Close-Approach Data: 2608 Seneca (1978 DA)" (2010-08-19 last obs). Retrieved 15 April 2016 .
^ "MPC/MPO/MPS Archive" . Minor Planet Center . Retrieved 26 March 2017 .
External links
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=2608_Seneca&oldid=1190797992 "
C a t e g o r i e s :
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