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16815 (1997 UA9)
Classification: Main-belt Asteroid          SPK-ID: 2016815
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02234779494410219 7.0966e-09  
a 2.560399062662441 9.0576e-09 au
q 2.503179789434989 1.6177e-08 au
i 11.04649414491877 3.7748e-07 deg
node 58.72105691907635 1.3397e-06 deg
peri 129.6373955328442 5.4766e-05 deg
M 100.8742103273597 5.2836e-05 deg
tp 2458781.187737376729
(2019-Oct-24.68773738)
0.00021998 TDB
period 1496.442094114071
4.10
7.9407e-06
2.174e-08
d
yr
n .2405706184128217 1.2766e-09 deg/d
Q 2.617618335889893 9.26e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2594  
   data-arc span      18471 days (50.57 yr)  
   first obs. used      1970-03-07  
   last obs. used      2020-10-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45232  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:42:45  

Additional Information
 Earth MOID = 1.50562 au 
 Jupiter MOID = 2.36349 au 
 T_jup = 3.409 
[ 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 12.73   n/a E2021B10  
rotation period rot_per 2.91773 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2013) http://www.asu.cas.cz/~ppravec/neo.htm]
[Polishook, D. (2014) Minor Planet Bull. 41, 49-53.]
[Pravec, P.; Fatka, P.; Vokrouhlický, D.; Scheirich, P.; et al. (2019) Icarus 333, 429-463.]

16815 (1997 UA9)          Discovered 1997-Oct-29 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 UA9 = 1970 EK = 1989 YX5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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