4489 Dracius

4489 Dracius
Shape model of Dracius from its lightcurve
Discovery [1]
Discovered byE. Bowell
Discovery siteLowell Obs.
Discovery date15 January 1988
Designations
(4489) Dracius
Named after
Dracius
(Greek mythology)[2]
1988 AK · 1980 KA1
1989 AQ1
Jupiter trojan [1][3][4]
Greek [5][6] · background [6]
AdjectivesDracian
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc37.94 yr (13,857 d)
Aphelion5.5196 AU
Perihelion4.9173 AU
5.2184 AU
Eccentricity0.0577
11.92 yr (4,354 d)
174.79°
0° 4m 57.72s / day
Inclination22.224°
86.540°
6.5830°
Jupiter MOID0.1975 AU
TJupiter2.8480
Physical characteristics
76.60±0.41 km[7]
92.93±7.4 km[8]
95.02±2.47 km[9]
12.580±0.001 h[10][a]
12.58±0.1 h[11]
12.582±0.001 h[12][a]
12.582±0.004 h[13]
0.050±0.003[9]
0.0514±0.009[8]
0.069±0.005[7]
D (SDSS-MOC)[14]
D (S3OS2)[15]
D (Pan-STARRS)[4][16]
V–I = 0.950±0.037[4]
9.00[1][3][4][9]
9.1[7]
9.12±0.22[16]

4489 Dracius, (prov. designation: 1988 AK), is a large Jupiter trojan from the Greek camp, approximately 90 kilometers (56 miles) in diameter. It was discovered on 15 January 1988, by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Observatory near Flagstaff, Arizona, in the United States.[1] The dark D-type asteroid belongs to the 50 largest Jupiter trojans and has a rotation period of 12.58 hours.[4] It was named after Dracius from Greek mythology, who was a commander of the Epeans who fought against Hector.[2]

  1. ^ a b c d Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference WGSBN-Bulletin-Archive was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference jpldata was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference lcdb was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference MPC-Jupiter-Trojans was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference AstDys-object was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Grav-2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference SIMPS was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Stephens-2016k was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference French-2011b was invoked but never defined (see the help page).
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  13. ^ Cite error: The named reference Mottola-2011 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SDSS-Taxonomy was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Lazzaro-2004 was invoked but never defined (see the help page).
  16. ^ a b Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).


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