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JPL Small-Body Database Browser
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27725 (1990 QF4)
Classification: Main-belt Asteroid          SPK-ID: 2027725
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06656318202546746 2.8843e-08  
a 2.353226298176169 7.7627e-09 au
q 2.196588067743552 6.8737e-08 au
i 7.263538629649525 3.7023e-06 deg
node 150.6086751942824 2.5461e-05 deg
peri 319.5998278442668 4.0105e-05 deg
M 211.6694566414389 3.2634e-05 deg
tp 2459143.777918399187
(2020-Oct-21.27791840)
0.0001205 TDB
period 1318.541995433332
3.61
6.5243e-06
1.786e-08
d
yr
n .2730288464431412 1.351e-09 deg/d
Q 2.509864528608787 8.2794e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2095  
   data-arc span      15241 days (41.73 yr)  
   first obs. used      1978-03-06  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48388  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 01:07:38  

Additional Information
 Earth MOID = 1.21846 au 
 Jupiter MOID = 2.54371 au 
 T_jup = 3.542 
[ show covariance matrix ]

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 13.4   n/a MPO435956  
diameter diameter 5.300 km 0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.208   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

27725 (1990 QF4)          Discovered 1990-Aug-23 by Holt, H. E. at Palomar
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 QF4 = 1978 EX2 = 1998 XL91 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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