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7984 Marius (1980 SM)
Classification: Main-belt Asteroid          SPK-ID: 2007984
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1993416573217972 1.5694e-08  
a 2.633451991970545 1.1475e-08 au
q 2.108495307413749 4.0576e-08 au
i 9.044204866170173 4.1991e-07 deg
node 340.232997337026 2.5434e-06 deg
peri 28.76018764940109 5.9065e-06 deg
M 144.7548044854286 5.3986e-06 deg
tp 2458572.850739443317
2.0829e-05 TDB
period 1560.94116947359
n .2306300884622102 1.5074e-09 deg/d
Q 3.158408676527342 1.3762e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2123  
   data-arc span      14798 days (40.51 yr)  
   first obs. used      1980-09-08  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50836  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:12:34  

Additional Information
 Earth MOID = 1.11027 au 
 Jupiter MOID = 2.32817 au 
 T_jup = 3.353 
[ 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 13.62   n/a E2021B10  
diameter diameter 10.014 km 0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 3.534 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.065   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7984 Marius           Discovered 1980 Sept. 29 by Z. Vavrova at Klet.
Simon Marius (1573-1625) was court astronomer in Ansbach. He discovered the Jovian satellites, but published his observations after Galileo, who accused him of plagiarism and ruined his reputation. Marius suggested the names for the satellites and also measured the diameter of the Andromeda Galaxy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-03-16Last Updated: 2014-03-21

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
2178-Jun-09 18:16 < 00:01 David 0.0312182763916187 0.0312044264141735 0.0312321349777147 7.56761861302696 7.56761854908074 2516718.261443359 0.509663257013606 1070.49795035839 26.3663649961822 49.8398104274491 135358.376502897 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 20:13:32 2021-Apr-12 20:13

Alternate Designations
 1980 SM = 1995 DJ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2021-Apr-17 15:39 UT
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