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 ]  
1845 Helewalda (1972 UC)
Classification: Main-belt Asteroid          SPK-ID: 2001845
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05634968273287491 3.4148e-08  
a 2.969293533951163 1.1972e-08 au
q 2.801974785372238 1.019e-07 au
i 10.7196903552549 4.0436e-06 deg
node 142.5878029927363 1.6928e-05 deg
peri 324.3754588353167 3.7156e-05 deg
M 43.50061729470264 3.1719e-05 deg
tp 2458774.675506530306
(2019-Oct-18.17550653)
0.00016487 TDB
period 1868.865839266834
5.12
1.1302e-05
3.094e-08
d
yr
n .1926301997907083 1.165e-09 deg/d
Q 3.136612282530088 1.2646e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2976  
   data-arc span      32364 days (88.61 yr)  
   first obs. used      1931-11-04  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40501  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:37:26  

Additional Information
 Earth MOID = 1.82541 au 
 Jupiter MOID = 1.92832 au 
 T_jup = 3.234 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.2   n/a MPO337261  
diameter diameter 19.930 km 0.377 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.2786 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Carbo, L.; Green, D.; Kragh, K.; Krotz, J.; et al. (2009) Minor Planet Bull. 36, 152-157.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Brinsfield, J.W. (2010) Minor Planet Bull. 37, 146-147.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[DeGraff, D.R. (2017) Minor Planet Bull. 44, 350-354.]
geometric albedo albedo 0.134   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1845 Helewalda (1972 UC)          Discovered 1972-Oct-30 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1915-Dec-07 18:10 00:02 Jupiter 1.99376225449193 1.99376175386009 1.99376275512559 4.06233523152265 3.95637397081439 2420839.257288470 1.72362695116446 124.971391205244 13.0765401376117 80.5999001774111 4602904.80374338 T 36 CATAB v2.0f-lin.ifort 2020-Jun-23 15:37:40 2020-Jun-23 15:37
2032-Dec-27 03:23 < 00:01 Jupiter 1.98481931313067 1.98481896660933 1.98481965965189 3.99195850264797 3.88358491683246 2463593.640945872 0.371664214990542 41.9885343832871 15.5089462234928 -89.1136698908654 4138739.95824452 T 36 CATAB v2.0f-lin.ifort 2020-Jun-23 15:37:40 2020-Jun-23 15:37
2069-Jan-11 04:31 < 00:01 Jupiter 1.94171177046959 1.94171142366971 1.94171211726959 4.03439598541707 3.92478046385586 2476757.688237245 0.977549651233969 79.7619998158287 15.1501471656231 -87.3065319102682 4076659.21142644 T 36 CATAB v2.0f-lin.ifort 2020-Jun-23 15:37:40 2020-Jun-23 15:37
2105-Jan-27 05:22 00:02 Jupiter 1.94159419467513 1.94159385061877 1.94159453873181 4.03697069869481 3.92742031263783 2489921.723785755 1.621284853428 128.940050197494 14.2891981458109 87.5404663301727 4145717.60516675 T 36 CATAB v2.0f-lin.ifort 2020-Jun-23 15:37:40 2020-Jun-23 15:37
2141-Feb-14 06:52 00:02 Jupiter 1.96412166768288 1.96412109806833 1.96412223730134 3.96693896220909 3.85669674381514 2503088.786343242 2.31449480266795 170.94233670454 13.5876338924806 81.8914562723522 4286114.71015741 T 36 CATAB v2.0f-lin.ifort 2020-Jun-23 15:37:40 2020-Jun-23 15:37

Alternate Designations
 1972 UC = 1931 VC1 = 1954 GG = 1971 OR = 1971 QX2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-10 07:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin