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48448 (1990 WR2)
Classification: Main-belt Asteroid          SPK-ID: 2048448
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .250869232283956 6.1843e-08  
a 2.54170599788916 1.1445e-08 au
q 1.90407016550718 1.6272e-07 au
i 8.99244193752715 3.3409e-06 deg
node 93.82261400255184 5.5305e-05 deg
peri 335.3049247303212 6.0809e-05 deg
M 101.5072570017474 2.6199e-05 deg
tp 2458583.168670485278
(2019-Apr-09.66867049)
0.00010547 TDB
period 1480.084114800913
4.05
9.9972e-06
2.737e-08
d
yr
n .2432294194633823 1.6429e-09 deg/d
Q 3.17934183027114 1.4317e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2140  
   data-arc span      14958 days (40.95 yr)  
   first obs. used      1979-01-24  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42413  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:31:02  

Additional Information
 Earth MOID = .922685 au 
 Jupiter MOID = 2.13265 au 
 T_jup = 3.384 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456616.5 (2013-Nov-20.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2494263004485837 6.1122e-08  
q 1.909135957073743 1.6048e-07 au
tp 2457102.876635879201
(2015-Mar-21.37663588)
9.902e-05 TDB
node 93.91158980939974 5.5288e-05 deg
peri 335.3810050233443 6.0862e-05 deg
i 8.990652849932902 3.3391e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2140  
   data-arc span      14958 days (40.95 yr)  
   first obs. used      1979-01-24  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42413  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:31:02  

Additional Information
 Jupiter MOID = 2.13265 au 
 T_jup = 3.384 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.735917034516091E-15 -9.800269750119082E-15 -5.216415854394511E-12 6.325564610478817E-14 -1.38373681127932E-12 -1.370429500377583E-14
q -9.800269750119082E-15 2.575247895195553E-14 1.385410112347369E-11 -1.669437031894331E-13 3.669954869884904E-12 3.638534774131877E-14
tp -5.216415854394511E-12 1.385410112347369E-11 9.804902441597776E-9 -1.295350797847935E-10 2.641229892559295E-9 2.444901722613029E-11
node 6.325564610478817E-14 -1.669437031894331E-13 -1.295350797847935E-10 3.056760127668955E-9 -3.052783680604477E-9 -2.48218105083532E-11
peri -1.38373681127932E-12 3.669954869884904E-12 2.641229892559295E-9 -3.052783680604477E-9 3.7041895893114E-9 3.079692850718605E-11
i -1.370429500377583E-14 3.638534774131877E-14 2.444901722613029E-11 -2.48218105083532E-11 3.079692850718605E-11 1.11498702655336E-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 14.0   n/a MPO365818  
diameter diameter 4.188 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.277   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48448 (1990 WR2)          Discovered 1990-Nov-21 by Endate, K., Watanabe, K. at Kitami
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 WR2 = 1979 BY = 1994 VT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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