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21031 (1989 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2021031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2308027235884594 2.7898e-08  
a 2.310174220451708 6.8047e-09 au
q 1.776979718407607 6.4397e-08 au
i 2.580418880143446 4.5494e-06 deg
node 199.2922360911034 7.5984e-05 deg
peri 221.4263870325042 7.6787e-05 deg
M 342.3389526217285 1.1607e-05 deg
tp 2459459.418662426788
(2021-Sep-01.91866243)
4.1483e-05 TDB
period 1282.52407620575
3.51
5.6666e-06
1.551e-08
d
yr
n .2806964849073498 1.2402e-09 deg/d
Q 2.843368722495808 8.3752e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1265  
   data-arc span      11610 days (31.79 yr)  
   first obs. used      1989-10-03  
   last obs. used      2021-07-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53609  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:56:32  

Additional Information
 Earth MOID = .790269 au 
 Jupiter MOID = 2.4992 au 
 T_jup = 3.548 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456587.5 (2013-Oct-22.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2320902064401644 2.7944e-08  
q 1.77402069617897 6.4569e-08 au
tp 2456894.324718418987
(2014-Aug-24.82471842)
3.6749e-05 TDB
node 199.4920509715776 7.6054e-05 deg
peri 221.2176503139907 7.6834e-05 deg
i 2.579187857326178 4.5468e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1265  
   data-arc span      11610 days (31.79 yr)  
   first obs. used      1989-10-03  
   last obs. used      2021-07-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53609  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:56:32  

Additional Information
 Jupiter MOID = 2.4992 au 
 T_jup = 3.548 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.808799052675443E-16 -1.798498517082774E-15 -3.091587435080544E-13 -5.585261268489867E-15 -1.059026562138214E-13 5.355628522093241E-17
q -1.798498517082774E-15 4.169162094695411E-15 7.573697547952626E-13 1.32785635659016E-14 2.539817702529762E-13 -1.413773084768837E-16
tp -3.091587435080544E-13 7.573697547952626E-13 1.350471867991583E-9 1.355906502679201E-11 4.088013057366513E-10 -1.76016773318854E-12
node -5.585261268489867E-15 1.32785635659016E-14 1.355906502679201E-11 5.784202594822376E-9 -5.773804742300903E-9 -1.129623713085627E-10
peri -1.059026562138214E-13 2.539817702529762E-13 4.088013057366513E-10 -5.773804742300903E-9 5.903415614262711E-9 1.122935210980312E-10
i 5.355628522093241E-17 -1.413773084768837E-16 -1.76016773318854E-12 -1.129623713085627E-10 1.122935210980312E-10 2.06732318715056E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.71   n/a MPCxxxxx  
diameter diameter 1.794 km 0.365 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.346   0.125 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21031 (1989 TO15)          Discovered 1989-Oct-03 by Debehogne, H. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TO15 = 1994 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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