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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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1958-Sep-05 04:19 < 00:01 Earth 0.493235700736562 0.493235574020135 0.493235827453941 1.4343825512998 1.43061148535886 2436451.680159430 0.242158974330365 53.4889563320484 4.68533628013276 -85.7099200863138 2689693.08208702 T 37 CATAB v2.0g-lin.ifort 2021-Jul-08 12:06:02 2021-Jul-08 12:06
1985-Aug-29 17:08 < 00:01 Earth 0.49466935139478 0.494669222985731 0.494669479804083 1.44739101282505 1.44366477236291 2446307.214091433 0.127242735400026 26.6576194868272 4.53910827866054 80.6059131777779 2814023.16202285 T 37 CATAB v2.0g-lin.ifort 2021-Jul-08 12:06:02 2021-Jul-08 12:06
2110-Sep-11 19:42 < 00:01 Earth 0.49174932352686 0.491748986743897 0.491749660316894 1.42431680793012 1.42050752590686 2491975.320508710 0.411575898284176 98.6902415292427 4.72013977309212 -80.8856936054024 2552547.79803106 T 37 CATAB v2.0g-lin.ifort 2021-Jul-08 12:06:02 2021-Jul-08 12:06
2137-Sep-04 12:28 < 00:01 Earth 0.493436750490869 0.493436483429958 0.493437017560784 1.42037605989978 1.41656926135075 2501830.019272310 0.522414934082512 112.881564592277 4.47573413781544 83.7375510724531 2799908.17904447 T 37 CATAB v2.0g-lin.ifort 2021-Jul-08 12:06:02 2021-Jul-08 12:06

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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