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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06669475599125817 2.853e-08  
a 2.353565228583487 7.6641e-09 au
q 2.196594769953602 6.8173e-08 au
i 7.263409474565276 3.6673e-06 deg
node 150.6046820184125 2.5319e-05 deg
peri 319.4338533361766 3.9962e-05 deg
M 321.0568556066308 3.2702e-05 deg
tp 2459143.164625210134
(2020-Oct-20.66462521)
0.00012006 TDB
period 1318.826866081033
3.61
6.4419e-06
1.764e-08
d
yr
n .2729698713749742 1.3333e-09 deg/d
Q 2.510535687213372 8.1752e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2179  
   data-arc span      15308 days (41.91 yr)  
   first obs. used      1978-03-06  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48396  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:09:14  

Additional Information
 Earth MOID = 1.21823 au 
 Jupiter MOID = 2.54201 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 13.5   n/a MPO502365  
diameter diameter 5.300 km 0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 1.50 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
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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