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48842 (1998 BA44)
Classification: Main-belt Asteroid          SPK-ID: 2048842
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07863903030547945 5.0961e-08  
a 3.144916771233889 2.0629e-08 au
q 2.897603565952616 1.5626e-07 au
i 15.70791029848691 5.0798e-06 deg
node 332.8261843598056 1.5115e-05 deg
peri 21.53494952618857 3.0589e-05 deg
M 125.0661269587807 2.711e-05 deg
tp 2458292.799729269127
(2018-Jun-23.29972927)
0.00015222 TDB
period 2037.099122347348
5.58
2.0043e-05
5.487e-08
d
yr
n .1767218865546278 1.7388e-09 deg/d
Q 3.392229976515161 2.2251e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1721  
   data-arc span      15742 days (43.10 yr)  
   first obs. used      1977-03-20  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47186  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:48:58  

Additional Information
 Earth MOID = 1.89573 au 
 Jupiter MOID = 2.01789 au 
 T_jup = 3.147 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456801.5 (2014-May-24.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07446646968892499 5.0316e-08  
q 2.913659338953924 1.527e-07 au
tp 2456240.894666726477
(2012-Nov-09.39466673)
0.00016159 TDB
node 332.9193544108255 1.5138e-05 deg
peri 19.34459651455076 3.2185e-05 deg
i 15.69033747460214 5.073e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1721  
   data-arc span      15742 days (43.10 yr)  
   first obs. used      1977-03-20  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47186  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:48:58  

Additional Information
 Jupiter MOID = 2.01789 au 
 T_jup = 3.147 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.531739401155592E-15 -7.626692479523181E-15 -4.617585420243689E-13 5.867240950649412E-15 -1.482776588471463E-13 -1.326224039992107E-16
q -7.626692479523181E-15 2.33175415862327E-14 1.582263424768229E-12 -1.814660400926288E-14 4.992315399821106E-13 -4.697937422626086E-17
tp -4.617585420243689E-13 1.582263424768229E-12 2.611098150155691E-8 -1.237014623144629E-12 4.599248246632647E-9 -1.03589333584546E-11
node 5.867240950649412E-15 -1.814660400926288E-14 -1.237014623144629E-12 2.291683096835389E-10 -2.212272446365824E-10 7.433037500834015E-13
peri -1.482776588471463E-13 4.992315399821106E-13 4.599248246632647E-9 -2.212272446365824E-10 1.035904075217694E-9 -2.650405224488937E-12
i -1.326224039992107E-16 -4.697937422626086E-17 -1.03589333584546E-11 7.433037500834015E-13 -2.650405224488937E-12 2.573502846632223E-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 12.9   n/a MPO337648  
diameter diameter 17.019 km 0.361 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.184 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.051   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48842 (1998 BA44)          Discovered 1998-Jan-25 by Tombelli, M., Forti, G. at Cima Ekar
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 BA44 = 2001 ON21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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