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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 118 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1968861521665233 3.7965e-08  
a 3.097501430495932 1.1168e-08 au
q 2.487646292515286 1.1904e-07 au
i 5.178169950327772 4.3916e-06 deg
node 61.0653526320379 4.6295e-05 deg
peri 331.6203716516098 4.7481e-05 deg
M 47.6485260162056 1.1085e-05 deg
tp 2458936.950212718016
(2020-Mar-28.45021272)
6.1179e-05 TDB
period 1991.203744460961
5.45
1.0769e-05
2.948e-08
d
yr
n .1807951602147352 9.7776e-10 deg/d
Q 3.707356568476578 1.3367e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2875  
   data-arc span      49626 days (135.87 yr)  
   first obs. used      1885-03-09  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4452  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:46  

Additional Information
 Earth MOID = 1.49438 au 
 Jupiter MOID = 1.73302 au 
 T_jup = 3.187 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455964.5 (2012-Feb-07.0) TDB
Reference: JPL 118 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1940854906265073 3.7361e-08  
q 2.499249965339436 1.1627e-07 au
tp 2456926.005211397266
(2014-Sep-25.50521140)
6.2849e-05 TDB
node 61.41532868719375 4.6705e-05 deg
peri 328.7761933201371 4.7933e-05 deg
i 5.159787972680486 4.3636e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2875  
   data-arc span      49626 days (135.87 yr)  
   first obs. used      1885-03-09  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4452  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:46  

Additional Information
 Jupiter MOID = 1.73302 au 
 T_jup = 3.187 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.395826008810053E-15 -4.331830787019765E-15 -4.113636530150947E-14 2.235533501998522E-15 -2.144064694611153E-14 2.878910559049594E-16
q -4.331830787019765E-15 1.351930785993886E-14 1.764439198236315E-13 -9.277845329323914E-15 6.769012577830717E-14 -4.754809742720429E-16
tp -4.113636530150947E-14 1.764439198236315E-13 3.950009474080681E-9 8.010650404342749E-12 6.959239475661252E-10 9.399927572899218E-13
node 2.235533501998522E-15 -9.277845329323914E-15 8.010650404342749E-12 2.181355114858256E-9 -2.171499255356598E-9 -4.752449783135792E-12
peri -2.144064694611153E-14 6.769012577830717E-14 6.959239475661252E-10 -2.171499255356598E-9 2.297543684422942E-9 4.806489834930165E-12
i 2.878910559049594E-16 -4.754809742720429E-16 9.399927572899218E-13 -4.752449783135792E-12 4.806489834930165E-12 1.904124232234941E-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 7.85   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

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