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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
16666 Liroma (1993 XL1)
Classification: Main-belt Asteroid          SPK-ID: 2016666
[ 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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2398309196476191 4.4656e-08  
a 2.352882156881641 1.0358e-08 au
q 1.788588265374244 1.0798e-07 au
i 23.08623479423771 5.3169e-06 deg
node 240.4156262257282 1.0595e-05 deg
peri 209.5724206330245 1.4735e-05 deg
M 3.30091475926004 1.1399e-05 deg
tp 2458588.412666633824
(2019-Apr-14.91266663)		 4.1699e-05 TDB
period 1318.252766029911
3.61		 8.7049e-06
2.383e-08		 d
yr
n .2730887499551294 1.8033e-09 deg/d
Q 2.917176048389039 1.2842e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1665  
   data-arc span      9256 days (25.34 yr)  
   first obs. used      1993-12-07  
   last obs. used      2019-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38793  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:06:07  

Additional Information
 Earth MOID = .825856 au 
 Jupiter MOID = 2.44186 au 
 T_jup = 3.413 
[ 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 12.8   n/a MPO358792  
diameter diameter 6.767 km 0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.352   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16666 Liroma           Discovered 1993 Dec. 7 by C. S. Shoemaker at Palomar.
The Meiers are a family of amateur astronomers living near Ottawa, Ontario. Linda (b. 1950) is an active observer. Between 1978 and 1984, Rolf (b. 1953) discovered four comets and has recently built an observatory. Son Matthew (b. 1985) has joined the Royal Astronomical Society of Canada's Ottawa Center.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1993 XL1 = 1999 NO57 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-15 10:54 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin