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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159624736478914 4.1198e-08  
a 2.974493215956532 1.5862e-08 au
q 2.499690520201153 1.1754e-07 au
i 2.451222387052211 3.3714e-06 deg
node 97.52774022770508 9.577e-05 deg
peri 119.5407568869928 9.6523e-05 deg
M 147.6035572603226 1.0825e-05 deg
tp 2458628.232919692571
(2019-May-24.73291969)
5.72e-05 TDB
period 1873.776987792292
5.13
1.4989e-05
4.104e-08
d
yr
n .1921253181917644 1.5368e-09 deg/d
Q 3.449295911711911 1.8394e-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 = 1.4942 au 
 Jupiter MOID = 1.51998 au 
 T_jup = 3.241 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457197.5 (2015-Jun-24.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1570048844682297 4.1312e-08  
q 2.510871067501667 1.1771e-07 au
tp 2456751.650939614465
(2014-Apr-04.15093961)
6.344e-05 TDB
node 97.55976028763874 9.5665e-05 deg
peri 119.9335552278728 9.6439e-05 deg
i 2.451378219459127 3.3712e-06 deg
  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
 Jupiter MOID = 1.51998 au 
 T_jup = 3.241 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.706645026600274E-15 -4.836545772897731E-15 -1.008256333039804E-12 -2.70079211990883E-14 -2.029815595030555E-13 -7.142265216872241E-16
q -4.836545772897731E-15 1.385631618033755E-14 2.62141947262921E-12 7.994142270153499E-14 5.324043562987993E-13 2.199139873194284E-15
tp -1.008256333039804E-12 2.62141947262921E-12 4.024652167642913E-9 2.713939410344498E-11 8.021293402500171E-10 -1.764823239253713E-13
node -2.70079211990883E-14 7.994142270153499E-14 2.713939410344498E-11 9.151791906648657E-9 -9.136889406962448E-9 -1.03469235520388E-12
peri -2.029815595030555E-13 5.324043562987993E-13 8.021293402500171E-10 -9.136889406962448E-9 9.300473400299682E-9 1.019043463399701E-12
i -7.142265216872241E-16 2.199139873194284E-15 -1.764823239253713E-13 -1.03469235520388E-12 1.019043463399701E-12 1.136518800348886E-11

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

[ show close-approach data ]
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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