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4078 Polakis (1983 AC)
Classification: Main-belt Asteroid          SPK-ID: 2004078
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1044938180105383 1.7714e-08  
a 3.018903264708128 1.4397e-08 au
q 2.703446536374297 5.7805e-08 au
i 11.60172907466051 8.125e-07 deg
node 83.12509828778339 5.7547e-06 deg
peri 229.0178503049016 1.0677e-05 deg
M 232.2540423549381 1.1559e-05 deg
tp 2459880.355926919707
(2022-Oct-27.85592692)
6.2733e-05 TDB
period 1915.897287107272
5.25
1.3705e-05
3.752e-08
d
yr
n .1879015135219216 1.3441e-09 deg/d
Q 3.334359993041959 1.5901e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3030  
   data-arc span      16219 days (44.41 yr)  
   first obs. used      1976-10-27  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40126  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:23:43  

Additional Information
 Earth MOID = 1.70291 au 
 Jupiter MOID = 1.90216 au 
 T_jup = 3.208 
[ 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 11.28   n/a E2020-QM5  
diameter diameter 19.647 km 0.254 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.831 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Torno, S.; Oliver, R.L.; Ditteon, R. (2008) Minor Planet Bull. 35, 54-55.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Polakis, T.; Skiff, B. (2019) Minor Planet Bull. 46, 132-137.]
geometric albedo albedo 0.138   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4078 Polakis (1983 AC)          Discovered 1983-Jan-09 by Skiff, B. A. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1983 AC = 1949 QH2 = 1976 UY3 = 1987 YX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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