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2557 Putnam (1981 SL1)
Classification: Main-belt Asteroid          SPK-ID: 2002557
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1555791402053463 1.3097e-08  
a 2.350635153336939 5.9745e-09 au
q 1.984925357244316 2.9684e-08 au
i 6.067775627243928 5.1968e-07 deg
node 188.1846616264879 7.1169e-06 deg
peri 189.4767537297849 9.705e-06 deg
M 315.0873104174521 9.2509e-06 deg
tp 2459364.726345809003
(2021-May-30.22634581)
3.4205e-05 TDB
period 1316.364818957859
3.60
5.0186e-06
1.374e-08
d
yr
n .2734804172942005 1.0426e-09 deg/d
Q 2.716344949429563 6.904e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2959  
   data-arc span      20863 days (57.12 yr)  
   first obs. used      1963-10-13  
   last obs. used      2020-11-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38895  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:56:43  

Additional Information
 Earth MOID = .985327 au 
 Jupiter MOID = 2.74549 au 
 T_jup = 3.534 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.64   n/a E2021B10  
diameter diameter 7.465 km 0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 35.68 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2006) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.348   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2557 Putnam (1981 SL1)          Discovered 1981-Sep-26 by Skiff, B. A. and Thomas, N. G. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 SL1 = 1956 VF = 1963 TE = 1970 PN = 1970 QN1 = 1976 GX4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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