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181809 (1998 RN4)
Classification: Main-belt Asteroid          SPK-ID: 2181809
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2542469166759037 5.2227e-08  
a 2.345454339590074 1.0555e-08 au
q 1.74912980554518 1.2076e-07 au
i 13.48476141779709 7.6716e-06 deg
node 349.3975939942057 1.9351e-05 deg
peri 312.792679598962 2.4808e-05 deg
M 107.653569637769 1.8209e-05 deg
tp 2458808.157969733506
(2019-Nov-20.65796973)
6.451e-05 TDB
period 1312.015304008873
3.59
8.8569e-06
2.425e-08
d
yr
n .2743870432761091 1.8523e-09 deg/d
Q 2.941778873634968 1.3239e-08 au
  Orbit Determination Parameters
   # obs. used (total)      285  
   data-arc span      8150 days (22.31 yr)  
   first obs. used      1998-08-27  
   last obs. used      2020-12-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .63188  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:07  

Additional Information
 Earth MOID = .762259 au 
 Jupiter MOID = 2.42473 au 
 T_jup = 3.481 
[ 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 16.52   n/a MPCxxxxx  

181809 (1998 RN4)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1998 RN4 = 2005 OC1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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