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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 121 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1968860744604822 2.2527e-08  
a 3.097501441213928 9.9069e-09 au
q 2.487646541817632 6.7887e-08 au
i 5.178169308653233 2.52e-07 deg
node 61.06540662486218 3.6877e-06 deg
peri 331.6202974574443 6.26e-06 deg
M 47.64854178545463 3.8127e-06 deg
tp 2458936.950124128478
(2020-Mar-28.45012413)
2.052e-05 TDB
period 1991.203754795926
5.45
9.5528e-06
2.615e-08
d
yr
n .1807951592763522 8.6737e-10 deg/d
Q 3.707356340610225 1.1857e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2951  
   data-arc span      49688 days (136.04 yr)  
   first obs. used      1885-03-09  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44459  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:06:20  

Additional Information
 Earth MOID = 1.49438 au 
 Jupiter MOID = 1.73302 au 
 T_jup = 3.187 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457245.5 (2015-Aug-11.0) TDB
Reference: JPL 121 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1935818012682852 2.3145e-08  
q 2.499650338470688 6.9849e-08 au
tp 2456927.291541418616
(2014-Sep-26.79154142)
1.9777e-05 TDB
node 61.40005118044082 3.7207e-06 deg
peri 329.0463881826063 6.4517e-06 deg
i 5.158819587181578 2.503e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2951  
   data-arc span      49688 days (136.04 yr)  
   first obs. used      1885-03-09  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44459  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:06:20  

Additional Information
 Jupiter MOID = 1.73302 au 
 T_jup = 3.187 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.3569008250044E-16 -1.606625972085841E-15 -2.043861976535044E-13 -5.688943998373286E-15 -7.678586336874955E-14 -2.969229905355701E-16
q -1.606625972085841E-15 4.878818068288339E-15 6.280704765041234E-13 1.695396293552516E-14 2.348467625264496E-13 9.967773945118995E-16
tp -2.043861976535044E-13 6.280704765041234E-13 3.911248565624912E-10 -9.843349130884691E-12 1.034167831863113E-10 -1.35468285696747E-12
node -5.688943998373286E-15 1.695396293552516E-14 -9.843349130884691E-12 1.384334530726429E-11 -1.487572611148786E-11 1.070111634066094E-13
peri -7.678586336874955E-14 2.348467625264496E-13 1.034167831863113E-10 -1.487572611148786E-11 4.16239627652561E-11 -4.026627009534875E-13
i -2.969229905355701E-16 9.967773945118995E-16 -1.35468285696747E-12 1.070111634066094E-13 -4.026627009534875E-13 6.265219511872324E-14

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 7.85   n/a E2021B10 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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