57868 Pupin

57868 Pupin
Discovery [1]
Discovered by NEAT
Discovery site Palomar Obs.
Discovery date 17 December 2001
Designations
MPC designation 57868 Pupin
Named after
 Mihajlo Pupin
(physicist)[2]
2001 YD · 1997 WU46
main-belt · (inner) [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 18.21 yr (6,650 days)
Aphelion 2.9880 AU
Perihelion 1.7743 AU
2.3811 AU
Eccentricity 0.2548
3.67 yr (1,342 days)
37.779°
Inclination 4.2280°
287.72°
46.009°
Physical characteristics
Dimensions 5.725±0.107 km[4]
2.59 km (calculated)[3]
108.10±0.04 h[5]
0.0448±0.0065[4]
0.20 (assumed)[3]
S [3]
15.3[1][3]
15.2[4]
15.47±0.04[5]
15.67±0.14[6]

    57868 Pupin, provisional designation 2001 YD, is a stony asteroid and relatively slow rotator from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered by the Near-Earth Asteroid Tracking (NEAT) team at the U.S. Palomar Observatory, California, on 17 December 2001.[2]

    The S-type asteroid orbits the Sun at a distance of 1.8–3.0 AU once every 3 years and 8 months (1,342 days). Its orbit has an eccentricity of 0.25 and an inclination of 4° with respect to the plane of the ecliptic.[1]

    In September 2015, the first rotational light-curve of this asteroid was obtained by astronomer Vladimir Benishek at Sopot Astronomical Observatory, Serbia, and by American astronomer Frederick Pilcher at the U.S. Organ Mesa Observatory, New Mexico. It showed a rotation period of 108.10±0.04 hours with a brightness amplitude of 0.93 in magnitude (U=3-).[5] An asteroid of this size normally rotates once every few hours around its axis.

    According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 5.7 kilometers in diameter and its surface has a low albedo of 0.045.[4] However, the Collaborative Asteroid Lightcurve Link (CALL) assumes a standard albedo of 0.20 for stony asteroids, and calculates a diameter of only 2.6 kilometers, as the higher the albedo (reflectivity), the smaller the body's diameter, at a constant absolute magnitude (brightness).[3]

    In March 2016, the minor planet was named in honor of Serbian–American physicist and humanitarian, Mihajlo Pupin (1858–1935). He greatly improved long-distance telephone transmission and the sensitivity of X-ray detection, and worked for Serbian emigres. The asteroid's name was suggested by the above-mentioned astronomers Vladimir Benishek and Frederick Pilcher.[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 57868 Pupin (2001 YD)" (2016-02-10 last obs.). Jet Propulsion Laboratory. Retrieved 5 April 2016.
    2. 1 2 3 "57868 Pupin (2001 YD)". Minor Planet Center. Retrieved 5 April 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (57868) Pupin". Asteroid Lightcurve Database (LCDB). Retrieved 5 April 2016.
    4. 1 2 3 4 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 5 April 2016.
    5. 1 2 3 Benishek, Vladimir; Pilcher, Frederick (January 2016). "Rotation Period and H-G Parameters of (57868) 2001 YD". The Minor Planet Bulletin. 43 (1): 100–101. Bibcode:2016MPBu...43..100B. ISSN 1052-8091. Retrieved 5 April 2016.
    6. ↑ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 5 April 2016.

    External links


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