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819 Barnardiana (A916 EA)
Classification: Main-belt Asteroid          SPK-ID: 2000819
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1419772930647425 1.4477e-08  
a 2.197660331399811 4.0349e-09 au
q 1.885642466471901 3.1138e-08 au
i 4.896531099893701 9.7797e-07 deg
node 333.1181564838085 9.9357e-06 deg
peri 306.5156425738695 9.8416e-06 deg
M 6.27066708017518 8.6267e-06 deg
tp 2459375.772328188164
(2021-Jun-10.27232819)
2.8504e-05 TDB
period 1189.978953890281
3.26
3.2772e-06
8.972e-09
d
yr
n .3025263588260006 8.3315e-10 deg/d
Q 2.509678196327721 4.6077e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3701  
   data-arc span      42693 days (116.89 yr)  
   first obs. used      1904-09-19  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40317  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:02:36  

Additional Information
 Earth MOID = .873988 au 
 Jupiter MOID = 2.62222 au 
 T_jup = 3.650 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456572.5 (2013-Oct-07.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1418139793822499 1.4447e-08  
q 1.885911156920144 3.1004e-08 au
tp 2456995.909513262011
(2014-Dec-04.40951326)
2.7878e-05 TDB
node 333.1681675098458 9.9313e-06 deg
peri 306.4626001076179 9.8468e-06 deg
i 4.898033352423461 9.7817e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3701  
   data-arc span      42693 days (116.89 yr)  
   first obs. used      1904-09-19  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40317  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:02:36  

Additional Information
 Jupiter MOID = 2.62222 au 
 T_jup = 3.650 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.087290182450136E-16 -4.452622083587479E-16 -1.05802703574682E-13 -1.590297544121082E-14 -3.000707324793817E-14 2.088446033851974E-15
q -4.452622083587479E-16 9.612362821576889E-16 2.299109414585078E-13 3.419917142948789E-14 6.529405106337129E-14 -4.543059926517747E-15
tp -1.05802703574682E-13 2.299109414585078E-13 7.771898468316401E-10 1.234540810497321E-10 1.078744481160038E-10 1.084968778306878E-11
node -1.590297544121082E-14 3.419917142948789E-14 1.234540810497321E-10 9.863005884590091E-11 -6.245308675359497E-11 4.461802726990908E-12
peri -3.000707324793817E-14 6.529405106337129E-14 1.078744481160038E-10 -6.245308675359497E-11 9.69587855331536E-11 -1.478512460479099E-12
i 2.088446033851974E-15 -4.543059926517747E-15 1.084968778306878E-11 4.461802726990908E-12 -1.478512460479099E-12 9.568235385267686E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.99   n/a MPO614063  
diameter diameter 8.917 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 66.70 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Alvarez, E.M. (2011) Minor Planet Bull. 38, 180-181.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.277   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
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)

819 Barnardiana (A916 EA)          Discovered 1916-Mar-03 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A916 EA = 1930 QX = 1955 EB = A904 SC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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