BREAKING NEWS
Cloud Server Hosting For Online Businesses
Inexpensive SEO Services
Benefits of Wanting to play Free Online Slot machines
3800 Karayusuf

Summary

3800 Karayusuf, provisional designation 1984 AB, is a Mars-crossing asteroid and suspected binary system from inside the asteroid belt, approximately 2.5 kilometers (1.6 miles) in diameter. It was discovered on 4 January 1984, by American astronomer Eleanor Helin at the Palomar Observatory in California.[1] The S/L-type asteroid has a short rotation period of 2.2 hours.[3] It was named after Syrian physician Alford Karayusuf, a friend of the discoverer.[1]

3800 Karayusuf
Discovery [1]
Discovered byE. F. Helin
Discovery sitePalomar Obs.
Discovery date4 January 1984
Designations
(3800) Karayusuf
Named after
Alford Karayusuf [1]
(discoverer's friend)
1984 AB · 1975 XL4
Mars-crosser [1][2][3]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc42.47 yr (15,513 d)
Aphelion1.6974 AU
Perihelion1.4584 AU
1.5779 AU
Eccentricity0.0757
1.98 yr (724 d)
349.96°
0° 29m 50.28s / day
Inclination14.847°
95.451°
115.76°
Physical characteristics
Mean diameter
2.51±0.25 km[4]
2.2319±0.0001 h[5][a]
0.281[4]
SMASS = S [2] · S [3][6]
L (SDSS-MOC)[7][8][9]
14.81±0.94[9]
15.00[1][2][3][4][10][11]
15.40[6]

Orbit and classification edit

Karayusuf is a Mars-crossing asteroid, a dynamically unstable group between the main-belt and the near-Earth populations, crossing the orbit of Mars at 1.66 AU. It orbits the Sun at a distance of 1.46–1.70 AU once every 2 years (724 days; semi-major axis of 1.58 AU). Its orbit has an eccentricity of 0.08 and an inclination of 15° with respect to the ecliptic. On 11 June 1938, Karayusuf passed 0.0151 AU (2,260,000 km; 1,400,000 mi) from Mars.[2]

The body's observation arc begins with its first observations as 1975 XL4 at Crimea–Nauchnij in December 1975, almost 12 years prior to its official discovery observation at Palomar.[1]

Naming edit

This minor planet was named after Syrian physician Alford Karayusuf, a supporter of the Near-earth asteroid research projects at JPL and a leader of the World Space Foundation's program of Solar System exploration.[1] The official naming citation was published by the Minor Planet Center on 2 November 1990 (M.P.C. 17221).[12] The main-belt asteroid 5255 Johnsophie, also discovered by Helin, was named after Alford Karayusuf's children, John and Sophie (also see the asteroid's citation).

Physical characteristics edit

In the SMASS classification, Karayusuf is a common, stony S-type asteroid.[2] The asteroid has also been characterized as an L-type asteroid by the Sloan Digital Sky Survey and Pan-STARRS' photometric survey.[7][8][9]

Rotation period edit

In March 2008, a rotational lightcurve of Karayusuf was obtained from photometric observations by Brian Warner at his Palmer Divide Observatory in Colorado. Lightcurve analysis gave a well-defined rotation period of 2.2319±0.0001 hours with a rather small brightness amplitude of 0.15 magnitude (U=3).[5][a] The body's rotation is close to the threshold-period of that of a fast rotator, which would fly apart if they were not composed of a solid, monolithic structure.

Follow-up observations by Warner in 2010, 2014 and 2018 gave similar results.[13][14][b] The asteroid was also observed by Brian Skiff (2.225 h) and William Ryan (2.23 h) in 2018.[c]

Binary candidate edit

During Brian Warner's photometric observations, two possible mutual eclipsing/occultation events were observed, indicating that Karayusuf is a binary asteroid with a satellite in its orbit. The data, however, was insufficient to calculate a rotation period.[5] In 2010 and in 2014, when observing conditions had a nearly identical phase angle, no evidence of an orbiting minor-planet moon was found.[13][14] The results of the 2018-observation have not yet been published.[b]

Diameter and albedo edit

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Karayusuf measures 2.51 kilometers in diameter and its surface has an albedo between 0.281,[4] while other NEOWISE observations gave a diameter of 1.624 kilometers with a not very plausible albedo of 0.657.[10][11] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 2.97 kilometers based on an absolute magnitude of 15.0.[3]

Notes edit

  1. ^ a b Lightcurve plots of (3800) Karayusuf from 2008 and 2010, by B. D. Warner at the Palmer Divide Observatory.
  2. ^ a b Warner (2018) web: rotation period 2.2328±0.0004 hours with a brightness amplitude of 0.18±0.01 mag. Quality code is 3. Summary figures for (3800) Karayusuf at the LCDB.
  3. ^ Photometric observation of (3800) Karayusuf by Brian Skiff and Bill Ryan. Quality code of 3-/2. Summary figures at the LCDB.

References edit

  1. ^ a b c d e f g h "3800 Karayusuf (1984 AB)". Minor Planet Center. Retrieved 24 September 2018.
  2. ^ a b c d e f "JPL Small-Body Database Browser: 3800 Karayusuf (1984 AB)" (2018-05-24 last obs.). Jet Propulsion Laboratory. Retrieved 24 September 2018.
  3. ^ a b c d e "LCDB Data for (3800) Karayusuf". Asteroid Lightcurve Database (LCDB). Retrieved 24 September 2018.
  4. ^ a b c d Alí-Lagoa, V.; Delbo', M. (July 2017). "Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data". Astronomy and Astrophysics. 603: 8. arXiv:1705.10263. Bibcode:2017A&A...603A..55A. doi:10.1051/0004-6361/201629917.
  5. ^ a b c Warner, Brian D. (October 2008). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: February-May 2008". The Minor Planet Bulletin. 35 (4): 163–166. Bibcode:2008MPBu...35..163W. ISSN 1052-8091.
  6. ^ a b Carry, B.; Solano, E.; Eggl, S.; DeMeo, F. E. (April 2016). "Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry". Icarus. 268: 340–354. arXiv:1601.02087. Bibcode:2016Icar..268..340C. doi:10.1016/j.icarus.2015.12.047.
  7. ^ a b Carvano, J. M.; Hasselmann, P. H.; Lazzaro, D.; Mothé-Diniz, T. (February 2010). "SDSS-based taxonomic classification and orbital distribution of main belt asteroids". Astronomy and Astrophysics. 510: 12. Bibcode:2010A&A...510A..43C. doi:10.1051/0004-6361/200913322. Retrieved 30 October 2019. (PDS data set)
  8. ^ a b "Asteroid 3800 Karayusuf". Small Bodies Data Ferret. Retrieved 24 September 2018.
  9. ^ a b c Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007.
  10. ^ a b Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System: EAR-A-COMPIL-5-NEOWISEDIAM-V1.0. Bibcode:2016PDSS..247.....M. Retrieved 24 September 2018.
  11. ^ a b Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117.
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 September 2018.
  13. ^ a b Warner, Brian D. (October 2010). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2010 March - June". The Minor Planet Bulletin. 37 (4): 161–165. Bibcode:2010MPBu...37..161W. ISSN 1052-8091.
  14. ^ a b Warner, Brian D. (July 2014). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 January-March". The Minor Planet Bulletin. 41 (3): 144–155. Bibcode:2014MPBu...41..144W. ISSN 1052-8091.

External links edit

  • Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
  • Dictionary of Minor Planet Names, Google books
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • 3800 Karayusuf at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 3800 Karayusuf at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

By using this platform, you agree to the Terms of Use ©2020 Knowpia