99 Dike

From Wikipedia, the free encyclopedia
Jump to: navigation, search
99 Dike
Discovery[1]
Discovered by Alphonse Borrelly
Discovery date 28 May 1868
Designations
Named after
Dike
A915 BA; 1935 UC; 1935 YL; 1939 UT; 1948 UE; 1948 WC; 1961 XJ; 1974 VB
Main belt
Orbital characteristics[2][3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 101.25 yr (36980 d)
Aphelion 3.18448 AU (476.391 Gm)
Perihelion 2.14561 AU (320.979 Gm)
2.66504 AU (398.684 Gm)
Eccentricity 0.19491
4.35 yr (1589.1 d)
18.07 km/s
18.1950°
0° 13m 35.551s / day
Inclination 13.8487°
41.5307°
195.413°
Earth MOID 1.13747 AU (170.163 Gm)
Jupiter MOID 1.82393 AU (272.856 Gm)
Jupiter Tisserand parameter 3.316
Physical characteristics
Dimensions 69.04±2.7 km
Mass ~3.9×1017 kg
Mean density
2.0? g/cm³
Equatorial surface gravity
~0.0201 m/s²
Equatorial escape velocity
~0.0380 km/s
18.127 h (0.7553 d)[3][4]
0.0627±0.005[3]
0.058 [5]
Temperature ~172 K
C (Tholen)
Xk (Bus)[6]
9.43

99 Dike (/ˈdk/ DY-kee) is a quite large and dark main-belt asteroid. Dike was discovered by Alphonse Borrelly on May 28, 1868. It was his first asteroid discovery. It is named after Dike, the Greek goddess of moral justice.

Based upon a light curve that was generated from photometric observations of this asteroid at Pulkovo Observatory, it has a rotation period of 18.127 ± 0.002 hours and varies in brightness by 0.22 ± 0.02 in magnitude.[4] But according to Shrindan E. (2009)[7] the rotation period is of 10.360 ± 0.001 h.

The asteroid is located near the Juno clump of asteroids, but is most likely unrelated.

Phase curve of (99) Dike

References[edit]

  1. ^ [1]
  2. ^ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory. 
  3. ^ a b c "99 Dike". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016. 
  4. ^ a b Pilcher, Frederick (October 2011), "Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana", The Minor Planet Bulletin, 38 (4), pp. 183–185, Bibcode:2011MPBu...38..183P. 
  5. ^ Asteroid Data Sets
  6. ^ DeMeo, Francesca E.; et al. (2011), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, archived from the original (PDF) on 17 March 2014, retrieved 22 March 2013.  See appendix A.
  7. ^ Sheridan, Edwin (2009), "Lightcurve Results for 99 Dike, 313 Chaldaea, 872 Holda 1274 Delportia, and 7304 Namiki", Minor Planet Bulletin, 36, pp. 55–56, Bibcode:2009MPBu...36...55S. 

External links[edit]