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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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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 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

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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
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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