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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3351426252663692 2.7728e-08  
a 2.251347586475811 4.5399e-09 au
q 1.496825045957204 6.2094e-08 au
i 2.724955840528257 3.2086e-06 deg
node 259.529614728445 7.0827e-05 deg
peri 84.55581654127604 7.099e-05 deg
M 99.97296994958305 5.2211e-06 deg
tp 2458657.856618945497
(2019-Jun-23.35661895)
1.7284e-05 TDB
period 1233.849681987322
3.38
3.7321e-06
1.022e-08
d
yr
n .2917697392604256 8.8253e-10 deg/d
Q 3.005870126994419 6.0614e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1944  
   data-arc span      32290 days (88.41 yr)  
   first obs. used      1931-09-07  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4845  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:48:09  

Additional Information
 Earth MOID = .492667 au 
 Jupiter MOID = 2.42838 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. 2019-August); 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

[ show close-approach data ]
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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