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245 Vera (A885 CA)
Classification: Main-belt Asteroid          SPK-ID: 2000245
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1966744409127539 3.9831e-08  
a 3.096638089690257 1.175e-08 au
q 2.487608524691288 1.2564e-07 au
i 5.178680095923576 4.4887e-06 deg
node 61.0669362964446 4.7522e-05 deg
peri 331.593032252795 4.8687e-05 deg
M 11.51387640648871 1.1335e-05 deg
tp 2458936.841974100533
(2020-Mar-28.34197410)
6.2618e-05 TDB
period 1990.371314989364
5.45
1.1328e-05
3.101e-08
d
yr
n .1808707738545376 1.0294e-09 deg/d
Q 3.705667654689227 1.4061e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2781  
   data-arc span      49546 days (135.65 yr)  
   first obs. used      1885-03-09  
   last obs. used      2020-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4455  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:04  

Additional Information
 Earth MOID = 1.49546 au 
 Jupiter MOID = 1.73363 au 
 T_jup = 3.187 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455861.5 (2011-Oct-27.0) TDB
Reference: JPL 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .194112123846806 3.9168e-08  
q 2.499101194864942 1.2271e-07 au
tp 2454931.093312430980
(2009-Apr-09.59331243)
6.3062e-05 TDB
node 61.41611572645166 4.7947e-05 deg
peri 328.745298301833 4.915e-05 deg
i 5.159688770262596 4.4604e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2781  
   data-arc span      49546 days (135.65 yr)  
   first obs. used      1885-03-09  
   last obs. used      2020-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4455  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:04  

Additional Information
 Jupiter MOID = 1.73363 au 
 T_jup = 3.187 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.534130604501605E-15 -4.793213155814462E-15 -1.09775199020178E-13 3.594615248574947E-15 -3.057855778094702E-14 4.277565539967401E-16
q -4.793213155814462E-15 1.505857071114795E-14 3.164265673050436E-13 -1.441741968273894E-14 9.903083350914893E-14 -8.904641928803263E-16
tp -1.09775199020178E-13 3.164265673050436E-13 3.976759721887147E-9 7.454715644557756E-12 7.014669492157832E-10 6.109156036009903E-13
node 3.594615248574947E-15 -1.441741968273894E-14 7.454715644557756E-12 2.298955303594503E-9 -2.289188802274815E-9 -1.470716605059193E-11
peri -3.057855778094702E-14 9.903083350914893E-14 7.014669492157832E-10 -2.289188802274815E-9 2.415714030117775E-9 1.47576708560474E-11
i 4.277565539967401E-16 -8.904641928803263E-16 6.109156036009903E-13 -1.470716605059193E-11 1.47576708560474E-11 1.989494526048533E-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 7.8   n/a MPO502155 IRAS observations used: 5
diameter diameter 75.949 km 2.626 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.38 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Debehogne, H.; Lagerkvist, C.-I.; Zappala, V. (1982) Astron. Astrophys. Suppl. Ser. 50, 277-281.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.228   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.841   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=5.56, mean=8.29, max.=16.51) deg.
U-B UB 0.476   0.010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=5.56, mean=7.87, max.=16.51) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   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)

245 Vera (A885 CA)          Discovered 1885-Feb-06 by Pogson, N. R. at Madras
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A885 CA = A919 HB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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