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198 Ampella (A879 LA)
Classification: Main-belt Asteroid          SPK-ID: 2000198
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 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2273221486599275 1.2528e-08  
a 2.458931092639447 3.647e-09 au
q 1.899961593253945 3.0983e-08 au
i 9.320689383267089 4.2924e-07 deg
node 268.2536416060886 2.8205e-06 deg
peri 89.15404820566997 8.5084e-06 deg
M 179.4216973341517 6.3664e-06 deg
tp 2458498.575462165398
(2019-Jan-15.07546217)
2.4474e-05 TDB
period 1408.373888860533
3.86
3.1332e-06
8.578e-09
d
yr
n .2556139409054677 5.6867e-10 deg/d
Q 3.01790059202495 4.476e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2872  
   data-arc span      44871 days (122.85 yr)  
   first obs. used      1898-05-16  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39961  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:01:26  

Additional Information
 Earth MOID = .921952 au 
 Jupiter MOID = 2.53644 au 
 T_jup = 3.437 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.50   n/a MPCxxxxx IRAS observations used: 22
diameter diameter 54.323 km 0.343 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.379 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[De Young, J.A.; Schmidt, R.E. (1993) Minor Planet Bull. 20, 31-32.]
[Martinez, L.E.; Pilcher, F. (2012) Minor Planet Bull. 39, 137.]
geometric albedo albedo 0.268   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.885   0.007 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=7.26, mean=16.87, max.=26.93) deg.
U-B UB 0.421   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=7.26, mean=16.87, max.=26.93) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
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)

198 Ampella (A879 LA)          Discovered 1879-Jun-13 by Borrelly, A. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A879 LA = 1957 YA1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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