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7481 San Marcello (1994 PA1)
Classification: Main-belt Asteroid          SPK-ID: 2007481
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .043011473650801 3.0661e-08  
a 2.920602479998885 1.2331e-08 au
q 2.794983063385949 8.9964e-08 au
i 12.77545257366739 3.4595e-06 deg
node 173.9706936471577 1.3905e-05 deg
peri 329.0321065926076 4.0416e-05 deg
M 246.2947853144739 3.9246e-05 deg
tp 2459576.317663691576
(2021-Dec-27.81766369)
0.00019989 TDB
period 1823.085770536386
4.99
1.1546e-05
3.161e-08
d
yr
n .1974673961138325 1.2506e-09 deg/d
Q 3.046221896611821 1.2861e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2536  
   data-arc span      23873 days (65.36 yr)  
   first obs. used      1954-07-28  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46595  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:26:34  

Additional Information
 Earth MOID = 1.81116 au 
 Jupiter MOID = 1.94069 au 
 T_jup = 3.242 
[ 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 12.5   n/a MPO358704  
diameter diameter 11.175 km 1.986 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 1.4 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.170   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

7481 San Marcello (1994 PA1)          Discovered 1994-Aug-11 by Boattini, A., Tombelli, M. at San Marcello Pisto
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1994 PA1 = 1987 DE4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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