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85581 (1998 DZ20)
Classification: Main-belt Asteroid          SPK-ID: 2085581
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1630436658632903 2.3677e-08  
a 2.560554429168978 9.5182e-09 au
q 2.143072248394783 6.0975e-08 au
i 13.42148178311171 6.9249e-07 deg
node 336.84549803 3.0953e-06 deg
peri 349.4127583532941 8.6867e-06 deg
M 80.616039354807 5.0408e-06 deg
tp 2459061.366068265621
(2020-Jul-30.86606827)
2.0678e-05 TDB
period 1496.578303647244
4.10
8.3447e-06
2.285e-08
d
yr
n .2405487231257195 1.3413e-09 deg/d
Q 2.978036609943173 1.107e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2238  
   data-arc span      10006 days (27.39 yr)  
   first obs. used      1994-03-09  
   last obs. used      2021-07-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43696  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:10:01  

Additional Information
 Earth MOID = 1.13255 au 
 Jupiter MOID = 2.38467 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 13.85   n/a E2021B10  
diameter diameter 4.751 km 0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 13.2207 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.236   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85581 (1998 DZ20)          Discovered 1998-Feb-22 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1998 DZ20 = 2002 AF119 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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