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30990 (1995 ST48)
Classification: Main-belt Asteroid          SPK-ID: 2030990
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1592708156743937 4.1153e-08  
a 2.976116754987594 1.6109e-08 au
q 2.502108211878491 1.1751e-07 au
i 2.45129250782773 3.3716e-06 deg
node 97.53628536915525 9.5731e-05 deg
peri 119.7058386008527 9.6486e-05 deg
M 109.7756048401454 1.0872e-05 deg
tp 2458628.657127954506
(2019-May-25.15712795)
5.7399e-05 TDB
period 1875.311315625681
5.13
1.5226e-05
4.169e-08
d
yr
n .1919681265720349 1.5586e-09 deg/d
Q 3.450125298096698 1.8674e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1245  
   data-arc span      9170 days (25.11 yr)  
   first obs. used      1995-09-26  
   last obs. used      2020-11-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58134  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:43:46  

Additional Information
 Earth MOID = 1.49492 au 
 Jupiter MOID = 1.52047 au 
 T_jup = 3.240 
[ 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 14.47   n/a E2021B10  
diameter diameter 6.993 km 0.363 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.61 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]
geometric albedo albedo 0.069   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30990 (1995 ST48)          Discovered 1995-Sep-26 by Spacewatch at Kitt Peak
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1995 ST48 = 1995 UU18 = 1998 CQ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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