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9318 (1988 RG9)
Classification: Main-belt Asteroid          SPK-ID: 2009318
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1243118992830606 3.6039e-08  
a 2.222780549685555 6.1148e-09 au
q 1.946462477864698 8.1136e-08 au
i 3.063462068287381 3.1606e-06 deg
node 121.0474196700559 7.2731e-05 deg
peri 260.63400020 7.3736e-05 deg
M 229.4605969947964 1.2804e-05 deg
tp 2459639.417028267919
(2022-Feb-28.91702827)
4.3493e-05 TDB
period 1210.440116461633
3.31
4.9948e-06
1.368e-08
d
yr
n .2974124825376364 1.2273e-09 deg/d
Q 2.499098621506412 6.875e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1482  
   data-arc span      11603 days (31.77 yr)  
   first obs. used      1988-08-16  
   last obs. used      2020-05-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49069  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:18:04  

Additional Information
 Earth MOID = .950604 au 
 Jupiter MOID = 2.94823 au 
 T_jup = 3.636 
[ 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 15.27   n/a E2021B10  
diameter diameter 2.457 km 0.679 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.293   0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9318 (1988 RG9)          Discovered 1988-Sep-06 by Debehogne, H. at La Silla
Reference: 19981005/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1988 RG9 = 1995 WR18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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