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30816 (1990 QA6)
Classification: Main-belt Asteroid          SPK-ID: 2030816
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1799245815660817 3.1474e-08  
a 2.279559034493904 8.2341e-09 au
q 1.869410329057407 7.3818e-08 au
i 4.214321984684752 3.7821e-06 deg
node 350.3515708319333 3.9893e-05 deg
peri 19.08252813334427 4.0948e-05 deg
M 266.3497119660375 1.1551e-05 deg
tp 2459527.525267196026
(2021-Nov-09.02526720)
4.145e-05 TDB
period 1257.114085413966
3.44
6.8114e-06
1.865e-08
d
yr
n .2863701904043598 1.5516e-09 deg/d
Q 2.6897077399304 9.7157e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1676  
   data-arc span      10918 days (29.89 yr)  
   first obs. used      1990-08-16  
   last obs. used      2020-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54034  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:40:28  

Additional Information
 Earth MOID = .867638 au 
 Jupiter MOID = 2.77766 au 
 T_jup = 3.581 
[ 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 14.72   n/a E2021B10  
diameter diameter 2.873 km 0.511 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.330   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30816 (1990 QA6)          Discovered 1990-Aug-29 by Holt, H. E. at Palomar
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 QA6 = 1999 FE44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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