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30770 (1984 SL4)
Classification: Main-belt Asteroid          SPK-ID: 2030770
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2210565915312918 4.0062e-08  
a 2.235958195189115 7.4691e-09 au
q 1.74168489775415 9.1812e-08 au
i 4.409803666094088 4.6933e-06 deg
node 338.3322252114234 3.7309e-05 deg
peri 328.3835487140803 3.8336e-05 deg
M 337.8326350415564 8.6971e-06 deg
tp 2459275.697866104072
(2021-Mar-02.19786610)
2.9638e-05 TDB
period 1221.220106594333
3.34
6.1192e-06
1.675e-08
d
yr
n .2947871543025499 1.4771e-09 deg/d
Q 2.73023149262408 9.1202e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1291  
   data-arc span      13022 days (35.65 yr)  
   first obs. used      1984-09-27  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55097  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:16:14  

Additional Information
 Earth MOID = .726848 au 
 Jupiter MOID = 2.53287 au 
 T_jup = 3.602 
[ 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 15.44   n/a E2021B10  
diameter diameter 5.400 km 0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5. 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:
[Clark, M. (2015) Minor Planet Bull. 42, 15-20.]
geometric albedo albedo 0.043   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30770 (1984 SL4)          Discovered 1984-Sep-27 by Mrkos, A. at Klet
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1984 SL4 = 1996 BL7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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