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30814 (1990 QW)
Classification: Main-belt Asteroid          SPK-ID: 2030814
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1500200664539796 2.2111e-08  
a 2.287682127502908 8.957e-09 au
q 1.94448390270934 5.0007e-08 au
i 7.506472663515714 1.0348e-06 deg
node 347.8111657903611 8.3102e-06 deg
peri 342.2337697896385 1.0422e-05 deg
M 273.690022430383 6.8944e-06 deg
tp 2459503.505456109218
(2021-Oct-16.00545611)
2.5367e-05 TDB
period 1263.839561438117
3.46
7.4225e-06
2.032e-08
d
yr
n .2848462819049262 1.6729e-09 deg/d
Q 2.630880352296475 1.0301e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1533  
   data-arc span      16004 days (43.82 yr)  
   first obs. used      1976-07-27  
   last obs. used      2020-05-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47871  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:40:28  

Additional Information
 Earth MOID = .933566 au 
 Jupiter MOID = 2.71726 au 
 T_jup = 3.574 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.62   n/a E2021B10  
diameter diameter 3.720 km 0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.557 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.243   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30814 (1990 QW)          Discovered 1990-Aug-19 by Helin, E. F. at Palomar
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 QW = 1987 XG1 = 1996 FM23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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