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 ]  
85195 von Helfta (1991 TW2)
Classification: Main-belt Asteroid          SPK-ID: 2085195
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2659405500263917 7.7659e-08  
a 2.300956081185098 4.5853e-09 au
q 1.689038555368163 1.777e-07 au
i 2.430281696594598 3.9935e-06 deg
node 250.9414836667389 9.101e-05 deg
peri 136.2630928479037 9.1597e-05 deg
M 67.42136018539443 7.2186e-06 deg
tp 2458761.743100816339
(2019-Oct-05.24310082)
2.56e-05 TDB
period 1274.855379211677
3.49
3.8107e-06
1.043e-08
d
yr
n .2823849715585862 8.4409e-10 deg/d
Q 2.912873607002034 5.8047e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1180  
   data-arc span      10365 days (28.38 yr)  
   first obs. used      1991-09-16  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49543  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:28:17  

Additional Information
 Earth MOID = .694761 au 
 Jupiter MOID = 2.54439 au 
 T_jup = 3.542 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457185.5 (2015-Jun-12.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2668636937250707 7.8517e-08  
q 1.686549356858316 1.8006e-07 au
tp 2457484.983871433988
(2016-Apr-06.48387143)
2.5477e-05 TDB
node 251.0720831572482 9.1386e-05 deg
peri 135.7591261737376 9.1952e-05 deg
i 2.424661045794183 3.9901e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1180  
   data-arc span      10365 days (28.38 yr)  
   first obs. used      1991-09-16  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49543  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:28:17  

Additional Information
 Jupiter MOID = 2.54439 au 
 T_jup = 3.542 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.164881098495906E-15 -1.413577194774397E-14 -1.145610091502203E-12 -2.039034872454678E-13 -5.513334661410672E-13 -6.113648527546734E-15
q -1.413577194774397E-14 3.242273662799449E-14 2.627881489255013E-12 4.673150999326879E-13 1.263776312774189E-12 1.406677041107144E-14
tp -1.145610091502203E-12 2.627881489255013E-12 6.49097604254827E-10 4.364774235185314E-11 2.768485761872834E-10 5.6451656962193E-13
node -2.039034872454678E-13 4.673150999326879E-13 4.364774235185314E-11 8.351310928193872E-9 -8.316072622853215E-9 -1.376753712809986E-10
peri -5.513334661410672E-13 1.263776312774189E-12 2.768485761872834E-10 -8.316072622853215E-9 8.455096407297762E-9 1.380667152110792E-10
i -6.113648527546734E-15 1.406677041107144E-14 5.6451656962193E-13 -1.376753712809986E-10 1.380667152110792E-10 1.592056869424387E-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 15.5   n/a MPO502664  
diameter diameter 2.566 km 0.623 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.8412 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2005) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.204   0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85195 von Helfta           Discovered 1991 Oct. 7 by F. Börngen and L. D. Schmadel at Tautenburg.
Gertrud von Helfta (1256-1302), "the Great", lived in the nunnery of Helfta near Eisleben. She is one of the greatest German mystics. Her popular poetic writings Legatus Divinae Pietatis and Exercitia Spiritualia represent her religious experiences and the theological view of her time.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050407/MPCPages.arcLast Updated: 2005-04-15

Alternate Designations
 1991 TW2 = 1998 UO33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-11 04:36 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin