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30823 (1990 SY15)
Classification: Main-belt Asteroid          SPK-ID: 2030823
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1333699363712185 3.0681e-08  
a 2.283744818373039 7.0313e-09 au
q 1.979161917258527 7.073e-08 au
i 5.96779697725401 3.4202e-06 deg
node 194.3383569087196 3.0573e-05 deg
peri 161.9979619683407 3.2952e-05 deg
M 323.8893886787001 1.4003e-05 deg
tp 2459522.945136413398
(2021-Nov-04.44513641)
4.9292e-05 TDB
period 1260.578191374263
3.45
5.8217e-06
1.594e-08
d
yr
n .2855832366951657 1.3189e-09 deg/d
Q 2.588327719487551 7.9691e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1882  
   data-arc span      11241 days (30.78 yr)  
   first obs. used      1990-09-16  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51476  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:46:16  

Additional Information
 Earth MOID = .975284 au 
 Jupiter MOID = 2.85832 au 
 T_jup = 3.584 
[ 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 14.57   n/a E2021B10  
diameter diameter 2.497 km 0.252 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.43471 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.540   0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30823 (1990 SY15)          Discovered 1990-Sep-16 by Holt, H. E. at Palomar
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 SY15 = 1997 TO8 = 1999 CR79 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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