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770 Bali (A913 UG)
Classification: Main-belt Asteroid          SPK-ID: 2000770
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 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1513478110850282 1.3563e-08  
a 2.220366875710476 4.0952e-09 au
q 1.884319209265992 3.0932e-08 au
i 4.383735353187928 3.7146e-07 deg
node 44.67949343484949 7.8968e-06 deg
peri 18.19396300106829 7.8577e-06 deg
M 174.6235513157548 7.5861e-06 deg
tp 2458810.313446557005
(2019-Nov-22.81344656)
2.4843e-05 TDB
period 1208.469061872979
3.31
3.3433e-06
9.153e-09
d
yr
n .2978975725220836 8.2416e-10 deg/d
Q 2.556414542154959 4.715e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3401  
   data-arc span      42984 days (117.68 yr)  
   first obs. used      1903-10-20  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42345  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:32:44  

Additional Information
 Earth MOID = .897492 au 
 Jupiter MOID = 2.74486 au 
 T_jup = 3.631 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456784.5 (2014-May-07.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1508653554849897 1.3522e-08  
q 1.88557995170945 3.0824e-08 au
tp 2456391.281337608034
(2013-Apr-08.78133761)
2.3428e-05 TDB
node 44.70813248653311 7.8942e-06 deg
peri 17.93416762543197 7.8647e-06 deg
i 4.385355705743649 3.7085e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3401  
   data-arc span      42984 days (117.68 yr)  
   first obs. used      1903-10-20  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42345  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:32:44  

Additional Information
 Jupiter MOID = 2.74486 au 
 T_jup = 3.631 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.828433608014614E-16 -4.142258082556281E-16 -2.838474241282028E-14 4.438912039971906E-14 -4.061323534231605E-14 2.47424611564067E-15
q -4.142258082556281E-16 9.501153296616554E-16 7.085638151794181E-14 -9.746112687277053E-14 9.246073948435043E-14 -5.442222679396727E-15
tp -2.838474241282028E-14 7.085638151794181E-14 5.488772233658729E-10 6.064768342312672E-11 8.550014634651684E-11 1.671970956739978E-12
node 4.438912039971906E-14 -9.746112687277053E-14 6.064768342312672E-11 6.231887931213401E-11 -4.182525763617104E-11 2.268126687394166E-12
peri -4.061323534231605E-14 9.246073948435043E-14 8.550014634651684E-11 -4.182525763617104E-11 6.185338999532462E-11 -1.705027274487247E-12
i 2.47424611564067E-15 -5.442222679396727E-15 1.671970956739978E-12 2.268126687394166E-12 -1.705027274487247E-12 1.375295071807109E-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 10.97   n/a E2021B10  
diameter diameter 16.388 km 0.286 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.8190 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
geometric albedo albedo 0.272   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.900   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.28, mean=8.78, max.=11.15) deg.
U-B UB 0.557   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.28, mean=8.78, max.=11.15) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

770 Bali (A913 UG)          Discovered 1913-Oct-31 by Massinger, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A913 UG = A903 UA = A905 JC = A908 FB = A913 YB = A916 QC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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