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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .15120394126277 3.3924e-08  
a 2.220923150170964 4.6336e-09 au
q 1.885110816623388 7.5065e-08 au
i 4.383283911238077 3.7256e-06 deg
node 44.68515539975534 4.6499e-05 deg
peri 18.28764980716681 4.8451e-05 deg
M 56.57568598968642 1.2138e-05 deg
tp 2458810.512052366413
(2019-Nov-23.01205237)
4.0763e-05 TDB
period 1208.923231802434
3.31
3.7833e-06
1.036e-08
d
yr
n .2977856579555188 9.3192e-10 deg/d
Q 2.556735483718541 5.3342e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2882  
   data-arc span      42558 days (116.52 yr)  
   first obs. used      1903-10-20  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44494  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:12:41  

Additional Information
 Earth MOID = .89866 au 
 Jupiter MOID = 2.74319 au 
 T_jup = 3.631 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455921.5 (2011-Dec-26.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1505719975199157 3.3924e-08  
q 1.886567908480544 7.497e-08 au
tp 2456391.760070748996
(2013-Apr-09.26007075)
4.1786e-05 TDB
node 44.7289210396027 4.6449e-05 deg
peri 18.07750406596785 4.843e-05 deg
i 4.386500954429613 3.7266e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2882  
   data-arc span      42558 days (116.52 yr)  
   first obs. used      1903-10-20  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44494  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:12:41  

Additional Information
 Jupiter MOID = 2.74319 au 
 T_jup = 3.631 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.150817034711004E-15 -2.539791118199509E-15 -1.828451209552054E-13 2.07580701847279E-15 -8.904745485973472E-14 -7.46926357974353E-16
q -2.539791118199509E-15 5.620452934217519E-15 3.740910190143329E-13 -4.746107386807174E-15 1.850244418105021E-13 1.724167691202851E-15
tp -1.828451209552054E-13 3.740910190143329E-13 1.74610206298178E-9 -2.128999436346611E-12 5.817517290687918E-10 -1.439379776722602E-12
node 2.07580701847279E-15 -4.746107386807174E-15 -2.128999436346611E-12 2.157549738468264E-9 -2.15125168944715E-9 -4.590456654594883E-12
peri -8.904745485973472E-14 1.850244418105021E-13 5.817517290687918E-10 -2.15125168944715E-9 2.345485953296484E-9 4.122123685295187E-12
i -7.46926357974353E-16 1.724167691202851E-15 -1.439379776722602E-12 -4.590456654594883E-12 4.122123685295187E-12 1.388778451634076E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.9   n/a MPO267709  
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. 2019-August); 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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