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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04309401788344464 1.7341e-08  
a 2.921915956535891 1.0715e-08 au
q 2.795998858051011 5.3948e-08 au
i 12.77458648390276 3.7487e-07 deg
node 173.9607127717807 3.9821e-06 deg
peri 328.4597135872503 1.5359e-05 deg
M 325.0462447972579 1.6881e-05 deg
tp 2459573.629683494477
(2021-Dec-25.12968349)
8.5646e-05 TDB
period 1824.315747711403
4.99
1.0035e-05
2.747e-08
d
yr
n .1973342610519142 1.0854e-09 deg/d
Q 3.047833055020771 1.1176e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3123  
   data-arc span      24355 days (66.68 yr)  
   first obs. used      1954-07-28  
   last obs. used      2021-04-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43831  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 12:10:24  

Additional Information
 Earth MOID = 1.81328 au 
 Jupiter MOID = 1.9382 au 
 T_jup = 3.241 
[ 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 12.58   n/a E2021B10  
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. 2020-October); 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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