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
JPL Small-Body Database Browser
Search: [ help ]  
1646 Rosseland (1939 BG)
Classification: Main-belt Asteroid          SPK-ID: 2001646
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1184783547951453 1.6372e-08  
a 2.360276840682686 6.3853e-09 au
q 2.080635123737518 3.8362e-08 au
i 8.380498432841177 6.7163e-07 deg
node 119.9658373823219 1.8483e-06 deg
peri 279.6328649873156 6.1666e-06 deg
M 340.4197056964479 7.2737e-06 deg
tp 2459468.537653651809
(2021-Sep-11.03765365)
2.6934e-05 TDB
period 1324.472191919328
3.63
5.3747e-06
1.472e-08
d
yr
n .2718063861184691 1.103e-09 deg/d
Q 2.639918557627854 7.1418e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2921  
   data-arc span      30607 days (83.80 yr)  
   first obs. used      1937-08-27  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40668  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:21:18  

Additional Information
 Earth MOID = 1.10763 au 
 Jupiter MOID = 2.73583 au 
 T_jup = 3.528 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456694.5 (2014-Feb-06.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1187307185211036 1.6429e-08  
q 2.079981547679572 3.8532e-08 au
tp 2456819.846038581762
(2014-Jun-11.34603858)
2.2443e-05 TDB
node 120.0106267022067 1.847e-06 deg
peri 279.8057898811115 6.1717e-06 deg
i 8.381894761228967 6.7223e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2921  
   data-arc span      30607 days (83.80 yr)  
   first obs. used      1937-08-27  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40668  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:21:18  

Additional Information
 Jupiter MOID = 2.73583 au 
 T_jup = 3.528 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.699111780158468E-16 -6.26482024633157E-16 2.649695656730383E-13 -3.92847466811978E-15 5.623569686416452E-14 -9.386736285287628E-16
q -6.26482024633157E-16 1.484741458745682E-15 -5.956795571172244E-13 8.907485776679533E-15 -1.232779701542154E-13 2.145041517090768E-15
tp 2.649695656730383E-13 -5.956795571172244E-13 5.036936569888286E-10 -9.71035553164212E-12 1.305560591901899E-10 -2.996000816611388E-12
node -3.92847466811978E-15 8.907485776679533E-15 -9.71035553164212E-12 3.411253523923773E-12 -5.560252058361653E-12 -8.763813587228503E-13
peri 5.623569686416452E-14 -1.232779701542154E-13 1.305560591901899E-10 -5.560252058361653E-12 3.809007035814965E-11 1.895364073003815E-13
i -9.386736285287628E-16 2.145041517090768E-15 -2.996000816611388E-12 -8.763813587228503E-13 1.895364073003815E-13 4.518961855847117E-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 12.11   n/a E2021B10  
diameter diameter 12.801 km 0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 69.2 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:
[Binzel, R.P.; Mulholland, J.D. (1983) Icarus 56, 519-533.]
[Angeli, C.A.; Lazzaro, D.; Florczak, A.; Betzler, A.S.; Carvano, J.M. (1999) Planet. Space Sci. 47, 699-714.]
geometric albedo albedo 0.202   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1646 Rosseland (1939 BG)          Discovered 1939-Jan-19 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1939 BG = 1937 QH = 1948 QR = 1955 NB = 1977 FK = 1980 ME 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Aug-02 18:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin