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783 Nora (A914 FB)
Classification: Main-belt Asteroid          SPK-ID: 2000783
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2296736857176798 1.1284e-08  
a 2.34303702644975 5.6464e-09 au
q 1.804903076812043 2.5705e-08 au
i 9.341593170412441 2.9149e-07 deg
node 142.0836471889043 3.5976e-06 deg
peri 154.7350974008984 5.494e-06 deg
M 191.86273971215 3.4265e-06 deg
tp 2459812.326974141216
(2022-Aug-20.82697414)
1.3645e-05 TDB
period 1309.987508502029
3.59
4.7353e-06
1.296e-08
d
yr
n .2748117807716046 9.9339e-10 deg/d
Q 2.881170976087457 6.9432e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3408  
   data-arc span      40017 days (109.56 yr)  
   first obs. used      1911-08-28  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:52:15  

Additional Information
 Earth MOID = .7922 au 
 Jupiter MOID = 2.37004 au 
 T_jup = 3.510 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456757.5 (2014-Apr-10.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2296901989882179 1.1215e-08  
q 1.804453036682412 2.5477e-08 au
tp 2457193.475058819389
(2015-Jun-19.97505882)
1.1135e-05 TDB
node 142.128918225224 3.5984e-06 deg
peri 154.7849798264839 5.5057e-06 deg
i 9.341606630724819 2.9173e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3408  
   data-arc span      40017 days (109.56 yr)  
   first obs. used      1911-08-28  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:52:15  

Additional Information
 Jupiter MOID = 2.37004 au 
 T_jup = 3.510 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.257655305923458E-16 -2.81797170828866E-16 -5.342846953910077E-14 -9.208623485467563E-15 -1.799055341378496E-14 -6.615398555747266E-16
q -2.81797170828866E-16 6.49057169438193E-16 1.181733777173832E-13 2.115485504835632E-14 3.931844956075437E-14 1.512265397352678E-15
tp -5.342846953910077E-14 1.181733777173832E-13 1.239780902605566E-10 4.391117009373865E-12 4.719391757034481E-11 3.882622469540313E-13
node -9.208623485467563E-15 2.115485504835632E-14 4.391117009373865E-12 1.294846948153221E-11 -1.054947780784878E-11 7.953273916378823E-13
peri -1.799055341378496E-14 3.931844956075437E-14 4.719391757034481E-11 -1.054947780784878E-11 3.031221981129996E-11 -5.923622634699904E-13
i -6.615398555747266E-16 1.512265397352678E-15 3.882622469540313E-13 7.953273916378823E-13 -5.923622634699904E-13 8.510557194956019E-14

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.16   n/a E2021B10  
diameter diameter 38.719 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 55.53 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:
[Polakis, T. (2018) Minor Planet Bull. 45, 269-273.]
[Polakis, T. (2020) Minor Planet Bull. 47, 94-101.]
geometric albedo albedo 0.034   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
SMASSII spectral type spec_B C   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)

783 Nora (A914 FB)          Discovered 1914-Mar-18 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A914 FB = A911 QG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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