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2986 Mrinalini (2525 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2002986
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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1626921992610046 3.2825e-08  
a 3.166748738675169 1.3369e-08 au
q 2.651543421873093 1.0616e-07 au
i 2.536978366844531 3.6843e-06 deg
node 51.24441572616259 7.0212e-05 deg
peri 303.2027808382385 7.0916e-05 deg
M 259.5528002624117 1.2088e-05 deg
tp 2459970.820303032070
7.1035e-05 TDB
period 2058.348163330385
n .1748975253134649 1.1075e-09 deg/d
Q 3.681954055477244 1.5544e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3084  
   data-arc span      24454 days (66.95 yr)  
   first obs. used      1954-08-27  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44087  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 09:12:57  

Additional Information
 Earth MOID = 1.64705 au 
 Jupiter MOID = 1.76116 au 
 T_jup = 3.181 
[ 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 12.18   n/a MPCxxxxx  
diameter diameter 19.210 km 0.295 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 15.9 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:
[Galad, A. (2009) Minor Planet Bull. 36, 183-186.]
geometric albedo albedo 0.083   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

2986 Mrinalini (2525 P-L)          Discovered 1960-Sep-24 by PLS at Palomar
These planets have all been discovered as a result of the Palomar survey of faint minor planets and subsequently identified with planets observed at other oppositions. In Sept. and Oct. 1960, T. Gehrels exposed 130 plates with the 122 cm Schmidt camera at Palomar. In the following years C. J. van Houten and I. van Houten-Groeneveld measured these plates astrometrically and photometrically at Leiden. P. Herget, Cincinnati, computed the orbits of the planets found on the NORC computer, Dahlgren, Virginia, USA.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 2525 P-L = 1977 QG1 = 1980 DB4 = 1986 ET3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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