1241 Dysona

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1241 Dysona
U–B = 0.290[1]
9.45[1][3][5][6][7][8][11] · 9.74[9]

1241 Dysona, provisional designation 1932 EB1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 77 kilometers in diameter. It was discovered on 4 March 1932, by English astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa.[15] The asteroid was named after English astronomer Frank Watson Dyson.[2]

Orbit and classification

Dysona is a non-

semi-major axis of 3.19 AU). Its orbit has an eccentricity of 0.10 and an inclination of 24° with respect to the ecliptic.[1]

The asteroid was first observed as A908 DC at Taunton Observatory (

Heidelberg Observatory in March 1920, or 12 years prior to its official discovery observation at Johannesburg.[15]

Physical characteristics

In the

spectral type is ambiguous, closest to a primitive P-type and somewhat similar to a D- and C-type asteroid (PDC).[1][3]

Rotation period and pole

In April 2006, a rotational

U=2).[12]

In 2016, a modeled lightcurve using data from UAPC, the Palomar Transient Factory survey, and individual observers, gave a concurring period of 8.60738 hours as well an astronomical pole of (125.0°, −68.0°) in ecliptic coordinates (λ, β).[13]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite

albedo between 0.04 and 0.0585.[5][6][7][8][9][10][11]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0425 and a diameter of 83.05 kilometers based on an absolute magnitude of 9.45.[3]

Naming

This

H 114). The lunar crater Dyson was also named in his honor.[2]

References

  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 1241 Dysona (1932 EB1)" (2017-07-01 last obs.). Jet Propulsion Laboratory. Retrieved 4 January 2018.
  2. ^
    ISBN 978-3-540-00238-3
    .
  3. ^ a b c d e "LCDB Data for (1241) Dysona". Asteroid Lightcurve Database (LCDB). Retrieved 4 January 2018.
  4. ^ a b "Asteroid 1241 Dysona – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
  5. ^
    S2CID 35447010
    .
  6. ^
    S2CID 9341381
    . Retrieved 4 January 2018.
  7. ^
    S2CID 46350317
    . Retrieved 4 January 2018.
  8. ^
    doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153
    )
  9. ^
    doi:10.3847/0004-6256/152/3/63
    .
  10. ^
    S2CID 119293330
    .
  11. ^
    Bibcode:2004PDSS...12.....T
    . Retrieved 22 October 2019.
  12. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1241) Dysona". Geneva Observatory. Retrieved 4 January 2018.
  13. ^
    S2CID 118627434
    .
  14. ^
    ISSN 1052-8091
    . Retrieved 4 January 2018.
  15. ^ a b "1241 Dysona (1932 EB1)". Minor Planet Center. Retrieved 4 January 2018.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=1241_Dysona&oldid=1195680399"