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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457037.5 (2015-Jan-15.0) TDB
Reference: JPL 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2282750211135721 1.2812e-08  
q 1.897439880140943 3.1849e-08 au
tp 2457087.605664240206
(2015-Mar-06.10566424)
2.3358e-05 TDB
node 268.4640430482722 2.824e-06 deg
peri 88.52043971462057 8.4219e-06 deg
i 9.313413071702893 4.3006e-07 deg
  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
 Jupiter MOID = 2.53644 au 
 T_jup = 3.437 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.641459181729047E-16 -4.06454265741349E-16 -2.368609512713109E-13 1.650027200666492E-14 -8.794532623456779E-14 1.987965399420663E-15
q -4.06454265741349E-16 1.014365286558673E-15 5.951612465961005E-13 -4.142728483504182E-14 2.207714187542958E-13 -4.943557629313113E-15
tp -2.368609512713109E-13 5.951612465961005E-13 5.455903576571643E-10 -2.154599614715053E-11 1.885892451934966E-10 -1.274238863744881E-12
node 1.650027200666492E-14 -4.142728483504182E-14 -2.154599614715053E-11 7.975225253684443E-12 -1.348141635606832E-11 9.352079421198114E-13
peri -8.794532623456779E-14 2.207714187542958E-13 1.885892451934966E-10 -1.348141635606832E-11 7.092794085684186E-11 -1.247235637891897E-12
i 1.987965399420663E-15 -4.943557629313113E-15 -1.274238863744881E-12 9.352079421198114E-13 -1.247235637891897E-12 1.849552337204796E-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 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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