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85552 (1997 YR7)
Classification: Main-belt Asteroid          SPK-ID: 2085552
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1122211517932566 6.2084e-08  
a 2.571506872493813 1.4893e-08 au
q 2.282929409418282 1.6063e-07 au
i 13.94229365102278 4.6372e-06 deg
node 299.7166024170338 2.3424e-05 deg
peri 92.01368052470639 3.2836e-05 deg
M 220.1639056887279 2.2278e-05 deg
tp 2459585.555067686241
(2022-Jan-06.05506769)
9.4584e-05 TDB
period 1506.19069707576
4.12
1.3085e-05
3.582e-08
d
yr
n .2390135596368594 2.0765e-09 deg/d
Q 2.860084335569343 1.6565e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1031  
   data-arc span      8160 days (22.34 yr)  
   first obs. used      1997-12-25  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:37:42  

Additional Information
 Earth MOID = 1.3394 au 
 Jupiter MOID = 2.56276 au 
 T_jup = 3.379 
[ 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 14.5   n/a MPO436373  
diameter diameter 3.340 km 0.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.735 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.398   0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85552 (1997 YR7)          Discovered 1997-Dec-28 by Kobayashi, T. at Oizumi
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Alternate Designations
 1997 YR7 = 2000 NC25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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