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1494 Savo (1938 SJ)
Classification: Main-belt Asteroid          SPK-ID: 2001494
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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1308481210060413 3.8515e-08  
a 2.190291962259957 4.4295e-09 au
q 1.903696374543606 8.4977e-08 au
i 2.455417469238432 4.2717e-06 deg
node 194.9963788997369 6.8241e-05 deg
peri 184.7080979195826 6.9217e-05 deg
M 57.92685263606654 1.1214e-05 deg
tp 2458809.985132656202
3.68e-05 TDB
period 1183.999287423126
n .3040542370456231 9.2236e-10 deg/d
Q 2.476887549976307 5.0091e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2770  
   data-arc span      29715 days (81.36 yr)  
   first obs. used      1938-09-27  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4181  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:56:25  

Additional Information
 Earth MOID = .905887 au 
 Jupiter MOID = 2.97617 au 
 T_jup = 3.661 
[ 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 12.3   n/a MPO347528  
diameter diameter 7.804 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.35011 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2006)]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Dykhuis, M.J.; Molnar, L.A.; Gates, C.J.; Gonzales, J.A.; et al. (2016) Icarus 267, 174-203.]
geometric albedo albedo 0.349   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B Sa   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1494 Savo (1938 SJ)          Discovered 1938-Sep-16 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1938 SJ = 1925 RL = 1938 SG1 = 1948 VR = 1951 SV = 1953 GD = 1966 HB = 1976 HZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-May-31 04:45 UT
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