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JPL Small-Body Database Browser
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17730 (1998 AS4)
Classification: Main-belt Asteroid          SPK-ID: 2017730
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1394435917778894 4.5286e-08  
a 2.426729505445819 8.6589e-09 au
q 2.088337626933073 1.1131e-07 au
i 11.09904012117709 3.8727e-06 deg
node 303.7950335059289 2.1216e-05 deg
peri 236.0371134426254 2.5604e-05 deg
M 178.2419826712169 1.6285e-05 deg
tp 2457916.843438585390
(2017-Jun-12.34343859)
6.1022e-05 TDB
period 1380.799059911956
3.78
7.3904e-06
2.023e-08
d
yr
n .2607186016066341 1.3954e-09 deg/d
Q 2.765121383958566 9.8664e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1978  
   data-arc span      9962 days (27.27 yr)  
   first obs. used      1992-08-25  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39822  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:22:04  

Additional Information
 Earth MOID = 1.11623 au 
 Jupiter MOID = 2.29394 au 
 T_jup = 3.471 
[ 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 13.0   n/a MPO400180  
diameter diameter 6.895 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.1214 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2017) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.217   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

17730 (1998 AS4)          Discovered 1998-Jan-06 by Spacewatch at Kitt Peak
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 AS4 = 1999 NR14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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