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30957 (1994 SQ7)
Classification: Main-belt Asteroid          SPK-ID: 2030957
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1402606792516986 3.1786e-08  
a 2.277000893907692 6.9448e-09 au
q 1.957627201871474 7.2903e-08 au
i 1.098184655528261 3.155e-06 deg
node 86.23162202560947 0.00019098 deg
peri 116.901298595008 0.00019134 deg
M 26.88259710541208 1.164e-05 deg
tp 2459106.784386842641
(2020-Sep-14.28438684)
4.0508e-05 TDB
period 1254.998562986953
3.44
5.7416e-06
1.572e-08
d
yr
n .2868529180967219 1.3123e-09 deg/d
Q 2.596374585943909 7.9189e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1208  
   data-arc span      10440 days (28.58 yr)  
   first obs. used      1991-11-08  
   last obs. used      2020-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52293  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:43:03  

Additional Information
 Earth MOID = .95354 au 
 Jupiter MOID = 2.35965 au 
 T_jup = 3.595 
[ 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 15.83   n/a E2021B10  
diameter diameter 1.918 km 0.325 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.303   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30957 (1994 SQ7)          Discovered 1994-Sep-28 by Spacewatch at Kitt Peak
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 SQ7 = 1991 VO12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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