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1319 Disa

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1319 Disa
Discovery [1]
Discovered byC. Jackson
Discovery siteJohannesburg Obs.
Discovery date19 March 1934
Designations
1319 Disa
Named after
Disa
(orchid – flowering plant)[2]
1934 FO · 1929 GE
1970 FM · A908 EA
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc108.07 yr (39473 days)
Aphelion3.6058 AU (539.42 Gm)
Perihelion2.3682 AU (354.28 Gm)
2.9870 AU (446.85 Gm)
Eccentricity0.20717
5.16 yr (1885.6 d)
324.58°
0° 11m 27.312s / day
Inclination2.7990°
256.15°
316.34°
Earth MOID1.3628 AU (203.87 Gm)
Jupiter MOID1.38069 AU (206.548 Gm)
TJupiter3.223
Physical characteristics
Dimensions24.00±0.37 km[4]
25.894±0.180 km[5]
16.88±1.12 km[6]
42.23 km (calculated)[3]
7.080 h (0.2950 d)[1][7]
7.082±0.001 h[8]
7.0820±0.0077 h[9]
0.116±0.004[4]
0.0959±0.0034[5]
0.391±0.038[6]
0.057 (assumed)[3]
C [3]
10.6

1319 Disa, provisional designation 1934 FO, is an assumed carbonaceous asteroid from the outer region of the asteroid belt, about 25 kilometers in diameter. It was discovered by English-born, South African astronomer Cyril Jackson at the Union Observatory, Johannesburg, on 19 March 1934.[10]

The asteroid orbits the Sun at a distance of 2.4–3.6 AU once every 5 years and 2 months (1,883 days). Its orbit shows an eccentricity of 0.21 and is tilted by 3 degrees to the plane of the ecliptic. It has a well-defined rotation period of 7.08 hours.[7][8][9]

The asteroid is one of the cases, where the Collaborative Asteroid Lightcurve Link (CALL) strongly disagrees with the (interpreted) observational data collected by space-based mission. While publications based on results from the Akari and WISE satellites assign a geometric albedo of 0.10 and 0.11, including and outlier of 0.39, CALL assumes the body to be carbonaceous with an albedo of only 0.06. This leads to notable discrepancies for the body's derived size, where CALL calculates a significantly larger diameter of 42 kilometers, compared to the 17–26 kilometers from the published satellite surveys (also see infobox for an overview).[3][4][5][6]

The minor planet was named after Disa, also known as "African weed-orchid", a large genus of more than a hundred tropical orchids, common in southern Africa.[2]

References

  1. ^ a b c "JPL Small-Body Database Browser: 1319 Disa (1934 FO)" (2015-10-22 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
  2. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1319) Disa. Springer Berlin Heidelberg. p. 108. ISBN 978-3-540-29925-7. Retrieved November 2015. {{cite book}}: Check date values in: |accessdate= (help)
  3. ^ a b c d e "LCDB Data for (1319) Disa". Asteroid Lightcurve Database (LCDB). Retrieved November 2015. {{cite web}}: Check date values in: |accessdate= (help)
  4. ^ a b c Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015. {{cite journal}}: Check date values in: |access-date= (help)
  5. ^ a b c 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. Retrieved November 2015. {{cite journal}}: Check date values in: |access-date= (help)
  6. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved November 2015. {{cite journal}}: Check date values in: |access-date= (help)
  7. ^ a b Warner, Brian D. (December 2006). "Asteroid lightcurve analysis at the Palmer Divide Observatory - February - March 2006". The Minor Planet Bulletin. 33 (4): 82–84. Bibcode:2006MPBu...33...82W. ISSN 1052-8091. Retrieved November 2015. {{cite journal}}: Check date values in: |access-date= (help)
  8. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1319) Disa". Geneva Observatory. Retrieved November 2015. {{cite web}}: Check date values in: |accessdate= (help)
  9. ^ a b 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 November 2015. {{cite journal}}: Check date values in: |access-date= (help)
  10. ^ "1319 Disa (1934 FO)". Minor Planet Center. Retrieved November 2015. {{cite web}}: Check date values in: |accessdate= (help)


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