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2659 Millis (1981 JX)
Classification: Main-belt Asteroid          SPK-ID: 2002659
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1018584680013142 1.4517e-08  
a 3.136363089277656 1.2751e-08 au
q 2.816897949907965 4.5433e-08 au
i 1.323145416922919 6.6152e-07 deg
node 157.0537246733413 2.2104e-05 deg
peri 331.2218124510301 2.497e-05 deg
M 160.0066248650709 1.3251e-05 deg
tp 2458298.776492305574
(2018-Jun-29.27649231)
7.219e-05 TDB
period 2028.793889276376
5.55
1.2372e-05
3.387e-08
d
yr
n .1774453294160915 1.0821e-09 deg/d
Q 3.455828228647347 1.405e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2630  
   data-arc span      22875 days (62.63 yr)  
   first obs. used      1958-02-24  
   last obs. used      2020-10-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47295  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:05:02  

Additional Information
 Earth MOID = 1.83192 au 
 Jupiter MOID = 1.58876 au 
 T_jup = 3.203 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.77   n/a E2021B10  
diameter diameter 27.878 km 0.337 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.132 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Galad, A. (2010) Astron. Astrophys. 514, A55.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.050   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2659 Millis (1981 JX)          Discovered 1981-May-05 by Bowell, E. at Flagstaff (AM)
on plates taken by B. A. Skiff at the Anderson Mesa station of the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 JX = 1958 DX = 1972 TP2 = 1978 UK2 = 1978 WX14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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