+ View the NASA Portal
+ Center for Near-Earth Object Studies
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.
Don't show this message again
JPL Small-Body Database Browser
Search:
[
help
]
74546 (1999 JR61)
Classification:
Main-belt Asteroid
SPK-ID:
2074546
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference:
JPL 16
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.1500025041992795
2.9571e-08
a
2.185640987776774
7.5546e-09
au
q
1.857789366329671
6.4051e-08
au
i
3.11536058944078
6.6054e-06
deg
node
230.5552436449757
6.9545e-05
deg
peri
63.22783933605621
7.3597e-05
deg
M
22.26499385362415
2.4703e-05
deg
t
p
2458527.506070221365
(2019-Feb-13.00607022)
8.088e-05
TDB
period
1180.230046011506
3.23
6.1191e-06
1.675e-08
d
yr
n
.3050252797889628
1.5815e-09
deg/d
Q
2.513492609223876
8.6878e-09
au
Orbit Determination Parameters
# obs. used (total)
887
data-arc span
10131 days (27.74 yr)
first obs. used
1992-02-29
last obs. used
2019-11-25
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.53112
source
ORB
producer
Otto Matic
solution date
2019-Dec-14 07:26:34
Additional Information
Earth MOID
= .843579 au
Jupiter MOID
= 2.65349 au
T_jup
= 3.660
[ 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
16.0
n/a
MPO436304
diameter
diameter
2.721
km
0.555
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)
geometric albedo
albedo
0.087
0.041
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)
74546 (1999 JR61)
Discovered 1999-May-10 by LINEAR at Socorro
Reference:
20040415/Numbers.arc
Last Updated:
2004-04-19
[ show close-approach data ]
Alternate Designations
1999 JR61
= 1992 DO9
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
2019-Dec-15 11:13 UT
(server date/time)
Site Manager:
Ryan S. Park
Webmaster
:
Alan B. Chamberlin