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2825 Crosby (1938 SD1)
Classification: Main-belt Asteroid          SPK-ID: 2002825
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1740469950941244 2.8137e-08  
a 2.245877181235242 5.6849e-09 au
q 1.854989006490787 6.2294e-08 au
i 3.519042416523856 3.5855e-06 deg
node 329.3665987299311 5.0352e-05 deg
peri 82.02538204517199 5.1837e-05 deg
M 60.03796251463232 1.0372e-05 deg
tp 2458795.477806645003
(2019-Nov-07.97780664)
3.5526e-05 TDB
period 1229.355336464166
3.37
4.6678e-06
1.278e-08
d
yr
n .2928364072794616 1.1119e-09 deg/d
Q 2.636765355979699 6.6744e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2413  
   data-arc span      29806 days (81.60 yr)  
   first obs. used      1938-09-16  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42856  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:45:41  

Additional Information
 Earth MOID = .86958 au 
 Jupiter MOID = 2.73002 au 
 T_jup = 3.608 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456650.5 (2013-Dec-24.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1740079030680411 2.8193e-08  
q 1.85481591560676 6.2408e-08 au
tp 2456335.302188981654
(2013-Feb-11.80218898)
3.7974e-05 TDB
node 329.519359024995 5.0297e-05 deg
peri 81.51942840568752 5.1791e-05 deg
i 3.521476465691861 3.5875e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2413  
   data-arc span      29806 days (81.60 yr)  
   first obs. used      1938-09-16  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42856  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:45:41  

Additional Information
 Jupiter MOID = 2.73002 au 
 T_jup = 3.608 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.948436208171623E-16 -1.754823932154849E-15 -2.456625250899812E-13 3.676621867393527E-15 -8.856520953905221E-14 -1.197078913295397E-15
q -1.754823932154849E-15 3.894787070073975E-15 4.863227220449137E-13 -7.680965080203548E-15 1.788814256297354E-13 2.653793691032751E-15
tp -2.456625250899812E-13 4.863227220449137E-13 1.442025015725456E-9 -4.976631274538331E-12 4.754791279781218E-10 4.596845421977126E-13
node 3.676621867393527E-15 -7.680965080203548E-15 -4.976631274538331E-12 2.529762789365227E-9 -2.526214976946231E-9 1.425172375362403E-11
peri -8.856520953905221E-14 1.788814256297354E-13 4.754791279781218E-10 -2.526214976946231E-9 2.682357586504213E-9 -1.407531928549295E-11
i -1.197078913295397E-15 2.653793691032751E-15 4.596845421977126E-13 1.425172375362403E-11 -1.407531928549295E-11 1.287002554114133E-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 13.2   n/a MPO347542  
diameter diameter 5.065 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.8135 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Aznar Macias, A. (2017) Minor Planet Bull. 44, 276-279.]
[Pray, D.P.; Pravec, P.; Vrastil, V.; Hornoch, K; et al. (2017) CBET 4371.]
geometric albedo albedo 0.301   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2825 Crosby (1938 SD1)          Discovered 1938-Sep-19 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
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
1962-Jul-31 13:50 00:01 Iris 0.0223595178197891 0.0223587249159468 0.022360311117287 2.415376339092 2.41537623264686 2437877.076591572 1.38948427411097 168.794901313811 17.2015963219184 -77.7745388060493 189805.768465055 T 32 CATAB v2.0f-lin.ifort 2020-May-20 01:45:55 2020-May-20 01:45
2039-Dec-27 05:18 00:01 Iris 0.0196963253442196 0.0196954037219457 0.0196972471953811 2.38510370322957 2.38510358085799 2466149.721076153 1.05729660456775 121.976776883904 16.2257711841515 69.2012903572365 169715.44560036 T 32 CATAB v2.0f-lin.ifort 2020-May-20 01:45:55 2020-May-20 01:45
2117-May-20 01:21 00:03 Iris 0.0381329988610122 0.0381268362765602 0.0381391620969461 2.40260631087943 2.40260624813294 2494417.556466570 3.31196837741828 394.921134271069 17.3007548554471 39.0539077764974 207735.462826237 T 32 CATAB v2.0f-lin.ifort 2020-May-20 01:45:55 2020-May-20 01:45

Alternate Designations
 1938 SD1 = 1948 RA = 1972 XA1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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