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27831 (1994 DF)
Classification: Main-belt Asteroid          SPK-ID: 2027831
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1636963944996993 3.4924e-08  
a 2.651928518894115 1.0816e-08 au
q 2.21781738188022 9.5837e-08 au
i 12.87916138570097 5.2053e-06 deg
node 160.0088379556211 1.7991e-05 deg
peri 275.7613397224213 2.4938e-05 deg
M 351.7354193707503 1.7376e-05 deg
tp 2458636.712580006856
(2019-Jun-02.21258001)
7.6206e-05 TDB
period 1577.397497500298
4.32
9.6507e-06
2.642e-08
d
yr
n .2282240212568437 1.3963e-09 deg/d
Q 3.086039655908009 1.2587e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1734  
   data-arc span      13734 days (37.60 yr)  
   first obs. used      1982-05-01  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49821  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:41:56  

Additional Information
 Earth MOID = 1.27629 au 
 Jupiter MOID = 2.26996 au 
 T_jup = 3.335 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456581.5 (2013-Oct-16.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1620679046841252 3.4739e-08  
q 2.222769620518096 9.5146e-08 au
tp 2457060.213285564826
(2015-Feb-06.71328556)
7.4597e-05 TDB
node 160.0331081988612 1.7982e-05 deg
peri 275.9483821086873 2.5045e-05 deg
i 12.87875733220705 5.2032e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1734  
   data-arc span      13734 days (37.60 yr)  
   first obs. used      1982-05-01  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49821  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:41:56  

Additional Information
 Jupiter MOID = 2.26996 au 
 T_jup = 3.335 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.206780530399478E-15 -3.291616713973355E-15 -1.332562896140558E-12 1.698481156284928E-15 -3.072163088635948E-13 -2.530545272132698E-15
q -3.291616713973355E-15 9.052793752740626E-15 3.654749249753568E-12 -5.639490226752849E-15 8.37235615836709E-13 7.051374556358534E-15
tp -1.332562896140558E-12 3.654749249753568E-12 5.564755120794904E-9 -3.835364097783157E-12 1.317902510088601E-9 6.372764763092438E-12
node 1.698481156284928E-15 -5.639490226752849E-15 -3.835364097783157E-12 3.233367776341661E-10 -3.157993622487326E-10 4.653359203884324E-11
peri -3.072163088635948E-13 8.37235615836709E-13 1.317902510088601E-9 -3.157993622487326E-10 6.272709685438728E-10 -4.394499817330094E-11
i -2.530545272132698E-15 7.051374556358534E-15 6.372764763092438E-12 4.653359203884324E-11 -4.394499817330094E-11 2.707360617870987E-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 13.6   n/a MPO449167  
diameter diameter 5.025 km 1.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.238   0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

27831 (1994 DF)          Discovered 1994-Feb-18 by Urata, T. at Oohira
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 DF = 1999 GR9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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