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1485 Isa (1938 OB)
Classification: Main-belt Asteroid          SPK-ID: 2001485
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1161183802145441 4.4596e-08  
a 3.02489787868095 1.2991e-08 au
q 2.673651636694108 1.3557e-07 au
i 8.924371664365205 4.3679e-06 deg
node 297.5282159985211 2.583e-05 deg
peri 47.11528654202959 2.9714e-05 deg
M 216.0755263812985 1.6581e-05 deg
tp 2459968.739533051749
(2023-Jan-24.23953305)
9.0443e-05 TDB
period 1921.60669373949
5.26
1.2379e-05
3.389e-08
d
yr
n .1873432275048084 1.2069e-09 deg/d
Q 3.376144120667792 1.4499e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2529  
   data-arc span      31943 days (87.46 yr)  
   first obs. used      1933-09-21  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41425  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:31:32  

Additional Information
 Earth MOID = 1.67296 au 
 Jupiter MOID = 2.01616 au 
 T_jup = 3.216 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456666.5 (2014-Jan-09.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .111134531615712 4.4016e-08  
q 2.695193202421031 1.3262e-07 au
tp 2456116.652029523403
(2012-Jul-08.15202952)
8.8269e-05 TDB
node 297.6146017886974 2.576e-05 deg
peri 46.46376690790691 3.0089e-05 deg
i 8.929504565024002 4.3614e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2529  
   data-arc span      31943 days (87.46 yr)  
   first obs. used      1933-09-21  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41425  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:31:32  

Additional Information
 Jupiter MOID = 2.01616 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.937436765554093E-15 -5.815122847034918E-15 -7.416668792396593E-14 -2.005458437063286E-15 -3.747190875013882E-14 9.787274434650305E-17
q -5.815122847034918E-15 1.758730913845522E-14 3.627343725679747E-13 4.597353831716289E-15 1.433144378210861E-13 -2.745810498335741E-16
tp -7.416668792396593E-14 3.627343725679747E-13 7.79150047875573E-9 -2.513485049027995E-12 1.393096202812731E-9 1.17280194080983E-13
node -2.005458437063286E-15 4.597353831716289E-15 -2.513485049027995E-12 6.635736664855825E-10 -6.562493881445756E-10 4.076076815816923E-11
peri -3.747190875013882E-14 1.433144378210861E-13 1.393096202812731E-9 -6.562493881445756E-10 9.053472652978459E-10 -4.026770626431497E-11
i 9.787274434650305E-17 -2.745810498335741E-16 1.17280194080983E-13 4.076076815816923E-11 -4.026770626431497E-11 1.902201858451067E-11

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 11.84   n/a E2021B10  
diameter diameter 17.336 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.117   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1485 Isa (1938 OB)          Discovered 1938-Jul-28 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1938 OB = 1933 SL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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