Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1626560140331758 1.2539e-08  
a 2.273696281197729 6.0049e-09 au
q 1.903865906976052 3.0503e-08 au
i 5.257215136764721 9.683e-07 deg
node 348.9814019814674 5.4011e-06 deg
peri 46.62536600711108 8.7833e-06 deg
M 30.759419535006 6.4082e-06 deg
tp 2459289.502719669085
(2021-Mar-16.00271967)
2.2141e-05 TDB
period 1252.267484283713
3.43
4.961e-06
1.358e-08
d
yr
n .2874785175835793 1.1389e-09 deg/d
Q 2.643526655419407 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      .46629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:32:01  

Additional Information
 Earth MOID = .913902 au 
 Jupiter MOID = 2.7998 au 
 T_jup = 3.587 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457436.5 (2016-Feb-18.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1638734366572526 1.2571e-08  
q 1.900811420545987 3.0591e-08 au
tp 2458037.345048197753
(2017-Oct-10.84504820)
2.0754e-05 TDB
node 349.0725415295376 5.4033e-06 deg
peri 46.60903408748822 8.743e-06 deg
i 5.256804297479238 9.6754e-07 deg
  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      .46629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:32:01  

Additional Information
 Jupiter MOID = 2.7998 au 
 T_jup = 3.587 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.580344868948521E-16 -3.798591277904035E-16 8.83061350251413E-14 1.028218547199172E-14 5.811585930219349E-15 -2.489930805697925E-15
q -3.798591277904035E-16 9.358192485681449E-16 -1.877699083860757E-13 -2.383711628859891E-14 -1.24435940330264E-14 5.758256544979167E-15
tp 8.83061350251413E-14 -1.877699083860757E-13 4.307136187348732E-10 -2.756211975092948E-11 1.375157692476159E-10 5.102942967653886E-12
node 1.028218547199172E-14 -2.383711628859891E-14 -2.756211975092948E-11 2.919580546682332E-11 -3.799231333953619E-11 -4.953181756690294E-12
peri 5.811585930219349E-15 -1.24435940330264E-14 1.375157692476159E-10 -3.799231333953619E-11 7.644041796279115E-11 6.552780579885751E-12
i -2.489930805697925E-15 5.758256544979167E-15 5.102942967653886E-12 -4.953181756690294E-12 6.552780579885751E-12 9.36128452937646E-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 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-22 19:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin