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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .111234275757757 5.4587e-08  
a 2.572974670747574 1.4436e-08 au
q 2.286771696703914 1.4269e-07 au
i 13.93778000760631 4.4011e-06 deg
node 299.7108015984764 2.1674e-05 deg
peri 91.66765217451274 3e-05 deg
M 315.024907991139 2.0855e-05 deg
tp 2459584.830757370541
(2022-Jan-05.33075737)
8.7858e-05 TDB
period 1507.480465855124
4.13
1.2687e-05
3.474e-08
d
yr
n .238809064630757 2.0098e-09 deg/d
Q 2.859177644791233 1.6042e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1161  
   data-arc span      8628 days (23.62 yr)  
   first obs. used      1997-12-25  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47835  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:54:03  

Additional Information
 Earth MOID = 1.34237 au 
 Jupiter MOID = 2.56346 au 
 T_jup = 3.379 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.51   n/a MPO637174  
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. 2020-October); 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

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