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39845 (1998 BT35)
Classification: Main-belt Asteroid          SPK-ID: 2039845
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1626560140279187 1.2539e-08  
a 2.273696281180139 6.0049e-09 au
q 1.903865906973276 3.0503e-08 au
i 5.257215136788823 9.683e-07 deg
node 348.9814019816188 5.4011e-06 deg
peri 46.62536600925122 8.7833e-06 deg
M 30.75941953532942 6.4082e-06 deg
tp 2459289.502719669202
(2021-Mar-16.00271967)
2.2141e-05 TDB
period 1252.267484269181
3.43
4.961e-06
1.358e-08
d
yr
n .2874785175869154 1.1389e-09 deg/d
Q 2.643526655387002 6.9817e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2270  
   data-arc span      12572 days (34.42 yr)  
   first obs. used      1986-09-12  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4663  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 20:45:02  

Additional Information
 Earth MOID = .913902 au 
 Jupiter MOID = 2.7998 au 
 T_jup = 3.587 
[ 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 14.36   n/a E2021B10  
diameter diameter 4.992 km 0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.214 h n/a LCDB (Rev. 2020-October); 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.195   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

39845 (1998 BT35)          Discovered 1998-Jan-28 by Spacewatch at Kitt Peak
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 BT35 = 1962 TK = 1986 RQ15 = 1993 VV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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