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7805 Moons (7610 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2007805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326882593697351 1.8699e-08  
a 2.274834069681985 7.1264e-09 au
q 1.972990296620911 4.3158e-08 au
i 4.272353843438276 3.1318e-07 deg
node 115.6251886593325 1.4946e-05 deg
peri 77.29211770481442 1.7309e-05 deg
M 8.513087829144713 8.1942e-06 deg
tp 2459170.864816135888
2.8449e-05 TDB
period 1253.207579341045
n .2872628652543685 1.3499e-09 deg/d
Q 2.576677842743058 8.072e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2109  
   data-arc span      22038 days (60.34 yr)  
   first obs. used      1960-10-17  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48591  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:02:50  

Additional Information
 Earth MOID = .977208 au 
 Jupiter MOID = 2.38364 au 
 T_jup = 3.594 
[ 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 14.25   n/a E2021B10  
diameter diameter 3.403 km 0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.383   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7805 Moons           Discovered 1960 Oct. 17 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Named in memory of Michèle Moons (1951-1998), well known for her work on celestial mechanics done at the department of mathematics of Facultés Universitaires N. D. de la Paix, Namur, Belgium. She was assistant editor of the journal Celestial Mechanics and Dynamical Astronomy for nearly ten years. In the early 1980s she developed an analytical theory of the libration of the moon that is widely used by several centers interested in analyzing the moon's motion. Her later work included studies on the effects of resonant motion in the minor planet belt. Her early death is a great loss to her family and to science. Citation prepared by J. Henrard and J. Schubart, the name being suggested by the latter.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980610/MPCPages.arcLast Updated: 2009-11-17

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
1929-Jun-28 20:50 < 00:01 Amphi 0.0253900569264321 0.0253872134352335 0.0253929020139285 4.32686081563237 4.3268607633041 2425791.367922090 0.522781169923459 358.169629979842 37.2924645891374 67.4183588728004 94087.5626852089 T 39 CATAB v2.0f-lin.ifort 2021-Apr-12 20:03:43 2021-Apr-12 20:03

Alternate Designations
 7610 P-L = 1981 UE24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2021-Apr-17 01:25 UT
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