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 ]  
30281 Horstman (2000 HH57)
Classification: Main-belt Asteroid          SPK-ID: 2030281
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2009296873261436 3.7413e-08  
a 2.325674709568793 7.6372e-09 au
q 1.858377617352816 8.8547e-08 au
i 7.478359404888935 4.0031e-06 deg
node 165.1220875184207 2.3307e-05 deg
peri 212.314694003607 2.4612e-05 deg
M 205.7049102081759 9.7249e-06 deg
tp 2459951.728163062156
(2023-Jan-07.22816306)
3.669e-05 TDB
period 1295.453659426613
3.55
6.3812e-06
1.747e-08
d
yr
n .2778949269087259 1.3689e-09 deg/d
Q 2.792971801784771 9.1718e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1650  
   data-arc span      23926 days (65.51 yr)  
   first obs. used      1955-12-11  
   last obs. used      2021-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49681  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 19:47:17  

Additional Information
 Earth MOID = .863245 au 
 Jupiter MOID = 2.67744 au 
 T_jup = 3.536 
[ 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 14.64   n/a E2021B10  
diameter diameter 2.514 km 0.442 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.326   0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30281 Horstman           Discovered 2000 Apr. 24 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Helen Horstman (b. 1936) is a long-time employee of Lowell Observatory, starting in 1964 and retiring in 2007. Helen served as observatory secretary, cataloged images from the Planetary Patrol, and became executive secretary to the director. Since retiring, she has volunteered in the library.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-03-12Last Updated: 2017-04-19

Alternate Designations
 2000 HH57 = 1976 SN6 = 1999 CA60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-30 05:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin