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1198 Atlantis (1931 RA)
Classification: Mars-crossing Asteroid          SPK-ID: 2001198
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3353924921553036 1.4288e-08  
a 2.251058731773437 4.1714e-09 au
q 1.496070533735987 3.2759e-08 au
i 2.724700822608388 1.165e-06 deg
node 259.5102556156916 1.284e-05 deg
peri 84.59805390556213 1.3344e-05 deg
M 215.4711135618477 3.8152e-06 deg
tp 2459891.757227349787
(2022-Nov-08.25722735)
1.4062e-05 TDB
period 1233.612229637012
3.38
3.429e-06
9.388e-09
d
yr
n .2918259006770137 8.1117e-10 deg/d
Q 3.006046929810887 5.5705e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2229  
   data-arc span      32773 days (89.73 yr)  
   first obs. used      1931-09-07  
   last obs. used      2021-05-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47339  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:05:12  

Additional Information
 Earth MOID = .491117 au 
 Jupiter MOID = 2.42904 au 
 T_jup = 3.549 
[ 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 14.4   n/a MPO502164  
rotation period rot_per 16. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Carbognani, A. (2014) Minor Planet Bull. 41, 4-8.]
SMASSII spectral type spec_B L   n/a Xu et al. (1995) Icarus 115, 1-35  

1198 Atlantis (1931 RA)          Discovered 1931-Sep-07 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1931 RA = 1958 RQ = 1975 TQ4 = 1975 VX6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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