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JPL Small-Body Database Browser
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17845 (1998 HY112)
Classification: Main-belt Asteroid          SPK-ID: 2017845
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1320716392058133 4.2379e-08  
a 2.863406050356222 1.3828e-08 au
q 2.485231319573832 1.2658e-07 au
i 13.67483923446602 3.7936e-06 deg
node 76.86401575163086 1.8653e-05 deg
peri 313.0413135363987 2.3559e-05 deg
M 23.11183213097891 1.4237e-05 deg
tp 2458886.880020142143
(2020-Feb-07.38002014)
6.9906e-05 TDB
period 1769.794472243602
4.85
1.282e-05
3.51e-08
d
yr
n .2034134503446726 1.4734e-09 deg/d
Q 3.241580781138612 1.5654e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1681  
   data-arc span      17635 days (48.28 yr)  
   first obs. used      1971-10-22  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46602  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:13:39  

Additional Information
 Earth MOID = 1.51412 au 
 Jupiter MOID = 2.2031 au 
 T_jup = 3.246 
[ 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 13.1   n/a MPO502305  
diameter diameter 10.144 km 0.535 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.6 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:
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.130   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

17845 (1998 HY112)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HY112 = 1971 UG4 = 1976 YU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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