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154 Bertha (A875 VD)
Classification: Main-belt Asteroid          SPK-ID: 2000154
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 .07673549211757048 4.6707e-08  
a 3.195094075348134 1.3549e-08 au
q 2.949916959114362 1.4967e-07 au
i 20.9736437841696 5.0929e-06 deg
node 36.72606343515906 1.1699e-05 deg
peri 160.4968294592776 3.1974e-05 deg
M 5.655291860697821 2.9114e-05 deg
tp 2458967.730001306628
(2020-Apr-28.23000131)
0.00016871 TDB
period 2086.046099866222
5.71
1.3269e-05
3.633e-08
d
yr
n .1725752849005048 1.0977e-09 deg/d
Q 3.440271191581907 1.4588e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2632  
   data-arc span      49325 days (135.04 yr)  
   first obs. used      1885-07-17  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41918  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:10:37  

Additional Information
 Earth MOID = 1.95131 au 
 Jupiter MOID = 1.53386 au 
 T_jup = 3.088 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.7   n/a MPO502154 IRAS observations used: 13
diameter diameter 192.611 km 2.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 25.224 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2012) Minor Planet Bull. 39, 57-60.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.044   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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)

154 Bertha (A875 VD)          Discovered 1875-Nov-04 by Henry, Prosper at Paris
In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2012-Mar-16 09:20 < 00:01 Jupiter 1.6436701870808 1.64366961830055 1.64367075586432 5.44997717428882 5.35458713804338 2456002.888898859 0.248024550978124 190.560408726545 20.8115743717123 -84.3548885619413 3589777.81045717 T 42 CATAB v2.0f-lin.ifort 2020-Aug-24 22:10:56 2020-Aug-24 22:10
2023-Apr-25 10:18 < 00:01 Jupiter 1.53460188310091 1.53460141101183 1.53460235519069 5.42850905657764 5.32586254725308 2460059.929393193 0.326734239833771 102.362893240122 19.0614353684221 -82.6496394142778 3581888.08425599 T 42 CATAB v2.0f-lin.ifort 2020-Aug-24 22:10:56 2020-Aug-24 22:10
2034-May-08 23:39 < 00:01 Jupiter 1.85640623465067 1.85640536498605 1.85640710431551 4.94896492239242 4.85589474315598 2464091.485498243 0.655710078836472 167.901880037987 42.5040070594476 -86.5645264382064 3514825.83364056 T 42 CATAB v2.0f-lin.ifort 2020-Aug-24 22:10:56 2020-Aug-24 22:10
2143-Jan-27 23:35 00:02 Jupiter 1.83346300087927 1.833460343883 1.83346565807898 5.2574725014568 5.16885460140174 2503801.482553796 2.42248478246695 1024.7022802277 37.2684917964579 -82.7935852253855 2925743.9350826 T 42 CATAB v2.0f-lin.ifort 2020-Aug-24 22:10:56 2020-Aug-24 22:10
2154-Feb-20 16:11 00:02 Jupiter 1.52793192308529 1.527931054544 1.52793279164691 5.47151309184249 5.36923997444224 2507843.174175488 2.19201490799517 308.708753652723 15.9149813711466 -82.5795608102941 3490748.57555155 T 42 CATAB v2.0f-lin.ifort 2020-Aug-24 22:10:56 2020-Aug-24 22:10
2165-Mar-29 18:57 00:03 Jupiter 1.6613513110124 1.66134919699464 1.66135342503442 5.32084480843805 5.22414686648558 2511898.289604888 2.61051257395653 197.363036093124 64.7413334298173 62.899621925653 3523323.49953455 T 42 CATAB v2.0f-lin.ifort 2020-Aug-24 22:10:56 2020-Aug-24 22:10
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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