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27728 (1990 QD8)
Classification: Outer Main-belt Asteroid          SPK-ID: 2027728
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1376050714987078 4.6127e-08  
a 3.204381257311481 2.0245e-08 au
q 2.763442145290015 1.4749e-07 au
i 6.007942571726723 4.5405e-06 deg
node 149.9854926054327 4.2528e-05 deg
peri 209.5199383971467 4.5095e-05 deg
M 51.63744007869634 1.3788e-05 deg
tp 2458699.977561321252
(2019-Aug-04.47756132)
8.073e-05 TDB
period 2095.147973243229
5.74
1.9856e-05
5.436e-08
d
yr
n .17182557251206 1.6284e-09 deg/d
Q 3.645320369332946 2.3031e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1215  
   data-arc span      17819 days (48.79 yr)  
   first obs. used      1971-03-26  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55632  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 02:54:55  

Additional Information
 Earth MOID = 1.76163 au 
 Jupiter MOID = 1.80327 au 
 T_jup = 3.170 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456848.5 (2014-Jul-10.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .138979997328465 4.6808e-08  
q 2.756468424503325 1.4964e-07 au
tp 2456581.167749409064
(2013-Oct-15.66774941)
8.359e-05 TDB
node 150.2648622349711 4.2224e-05 deg
peri 205.8205798871034 4.4737e-05 deg
i 6.02590346704552 4.5573e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1215  
   data-arc span      17819 days (48.79 yr)  
   first obs. used      1971-03-26  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55632  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 02:54:55  

Additional Information
 Jupiter MOID = 1.80327 au 
 T_jup = 3.170 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.190953463607042E-15 -6.96148963464477E-15 2.492351512467715E-13 1.011411441400691E-14 -8.682509674230808E-15 -7.580175156046543E-16
q -6.96148963464477E-15 2.239331178863389E-14 -1.235204414614249E-12 -3.169107103823369E-14 -4.312665686106037E-14 3.509710363377506E-15
tp 2.492351512467715E-13 -1.235204414614249E-12 6.987223750263413E-9 -1.144649621571926E-11 1.261818042215345E-9 -2.709635299452892E-12
node 1.011411441400691E-14 -3.169107103823369E-14 -1.144649621571926E-11 1.782858112166933E-9 -1.774946497067407E-9 5.815101124148707E-11
peri -8.682509674230808E-15 -4.312665686106037E-14 1.261818042215345E-9 -1.774946497067407E-9 2.001357198483766E-9 -5.830731763659003E-11
i -7.580175156046543E-16 3.509710363377506E-15 -2.709635299452892E-12 5.815101124148707E-11 -5.830731763659003E-11 2.076936243675194E-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 13.8   n/a MPO502365  
diameter diameter 9.629 km 0.306 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.076   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27728 (1990 QD8)          Discovered 1990-Aug-16 by Elst, E. W. at La Silla
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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