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121004 (1998 YQ27)
Classification: Main-belt Asteroid          SPK-ID: 2121004
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .168374992072249 3.965e-08  
a 2.285655251939676 8.5178e-09 au
q 1.900808067014439 8.9271e-08 au
i 3.427564866311814 4.221e-06 deg
node 80.51345506378894 6.8418e-05 deg
peri 317.6045456205673 6.9476e-05 deg
M 175.8037601780813 1.3046e-05 deg
tp 2458584.131870457050
(2019-Apr-10.63187046)
4.4246e-05 TDB
period 1262.160299704027
3.46
7.0554e-06
1.932e-08
d
yr
n .2852252602814546 1.5944e-09 deg/d
Q 2.670502436864914 9.9519e-09 au
  Orbit Determination Parameters
   # obs. used (total)      663  
   data-arc span      8116 days (22.22 yr)  
   first obs. used      1998-12-29  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54992  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:04:21  

Additional Information
 Earth MOID = .909098 au 
 Jupiter MOID = 2.73931 au 
 T_jup = 3.581 
[ 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 16.6   n/a MPO453680  

121004 (1998 YQ27)          Discovered 1998-Dec-29 by Sarounova, L. at Ondrejov
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 YQ27 = 2001 RK135 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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