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397 Vienna (A894 YA)
Classification: Main-belt Asteroid          SPK-ID: 2000397
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 107 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2476992368130747 3.4858e-08  
a 2.634222586065287 7.0298e-09 au
q 1.981727661901151 9.1259e-08 au
i 12.86359774878717 3.9879e-06 deg
node 227.9148671040941 1.6758e-05 deg
peri 140.0761280044097 1.845e-05 deg
M 164.8655245701214 9.4907e-06 deg
tp 2458285.337920473743
(2018-Jun-15.83792047)
3.9714e-05 TDB
period 1561.626357607281
4.28
6.2511e-06
1.711e-08
d
yr
n .2305288958823613 9.228e-10 deg/d
Q 3.286717510229423 8.7711e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2911  
   data-arc span      44431 days (121.65 yr)  
   first obs. used      1898-10-23  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41608  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:13:32  

Additional Information
 Earth MOID = 1.00056 au 
 Jupiter MOID = 2.2609 au 
 T_jup = 3.319 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.4   n/a MPO502156 IRAS observations used: 5
diameter diameter 49.032 km 1.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 15.48 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Ruthroff, J.C. (2010) Minor Planet Bull. 37, 32-33.]
[Pilcher, F.; Marciniak, A.; Kaminski, K.; Horbowicz, J.; et al. (2017) Minor Planet Bull. 44, 316.]
geometric albedo albedo 0.139   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.823   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=5.45, mean=10.38, max.=21.21) deg.
U-B UB 0.362   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=5.45, mean=10.38, max.=21.21) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B K   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)

397 Vienna (A894 YA)          Discovered 1894-Dec-19 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A894 YA = 1941 WA1 = 1951 AV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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