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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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1161183793270464 4.4409e-08  
a 3.024897878534321 1.297e-08 au
q 2.673651639249095 1.3507e-07 au
i 8.924371677826738 4.3498e-06 deg
node 297.5282160345098 2.5814e-05 deg
peri 47.11528660013717 2.9697e-05 deg
M 216.0755263727513 1.6581e-05 deg
tp 2459968.739533041512
(2023-Jan-24.23953304)
9.0443e-05 TDB
period 1921.606693599769
5.26
1.2359e-05
3.384e-08
d
yr
n .1873432275184303 1.2049e-09 deg/d
Q 3.376144117819547 1.4476e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2542  
   data-arc span      31959 days (87.50 yr)  
   first obs. used      1933-09-21  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41336  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:31:16  

Additional Information
 Earth MOID = 1.67296 au 
 Jupiter MOID = 2.01616 au 
 T_jup = 3.216 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456675.5 (2014-Jan-18.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1111628983945666 4.3841e-08  
q 2.695206613259606 1.3218e-07 au
tp 2456116.774504716242
(2012-Jul-08.27450472)
8.8222e-05 TDB
node 297.614125952668 2.5743e-05 deg
peri 46.48775048149738 3.0067e-05 deg
i 8.929729885200478 4.3437e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2542  
   data-arc span      31959 days (87.50 yr)  
   first obs. used      1933-09-21  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41336  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:31:16  

Additional Information
 Jupiter MOID = 2.01616 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.922006030610049E-15 -5.772535083107168E-15 -6.89413398444654E-14 -1.931397941717703E-15 -3.594343396563333E-14 1.037873985414656E-16
q -5.772535083107168E-15 1.747028990056027E-14 3.471502034637109E-13 4.319411036358041E-15 1.388698427962302E-13 -2.951305698868102E-16
tp -6.89413398444654E-14 3.471502034637109E-13 7.783136125857053E-9 -2.507637437156259E-12 1.391174977632906E-9 1.663684020754574E-13
node -1.931397941717703E-15 4.319411036358041E-15 -2.507637437156259E-12 6.626963783016941E-10 -6.553834620841741E-10 4.04194671206694E-11
peri -3.594343396563333E-14 1.388698427962302E-13 1.391174977632906E-9 -6.553834620841741E-10 9.040305958377396E-10 -3.992049176521381E-11
i 1.037873985414656E-16 -2.951305698868102E-16 1.663684020754574E-13 4.04194671206694E-11 -3.992049176521381E-11 1.886749467976082E-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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1919-Aug-28 20:19 00:02 Jupiter 1.9947023056376 1.994701952021 1.9947026592542 3.84215335671519 3.72999602055705 2422199.346612481 1.74753937479074 100.003744058984 15.7352907037689 -88.8169634880838 3591468.76002595 T 40 CATAB v2.0g-lin.ifort 2021-May-03 19:31:25 2021-May-03 19:31
1966-Dec-26 08:22 < 00:01 Jupiter 1.9993550063864 1.99935466503656 1.99935534773634 3.89138397240497 3.78094875122409 2439485.848388486 0.875800968801744 74.1509177680625 14.184480632156 -86.0572050268453 3849985.93419818 T 40 CATAB v2.0g-lin.ifort 2021-May-03 19:31:25 2021-May-03 19:31

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