+ 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
]
249617 (1999 TP21)
Classification:
Main-belt Asteroid
SPK-ID:
2249617
[
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 12
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.2399750716926216
7.2365e-08
a
3.185884962600126
2.5651e-08
au
q
2.421351990295716
2.2676e-07
au
i
14.58097998835911
8.1151e-06
deg
node
48.17698537686055
2.3527e-05
deg
peri
338.8153292428493
2.6486e-05
deg
M
167.5768271382352
1.2753e-05
deg
t
p
2457633.659076548092
(2016-Sep-02.15907655)
6.7302e-05
TDB
period
2077.03379033169
5.69
2.5084e-05
6.868e-08
d
yr
n
.1733240940401408
2.0932e-09
deg/d
Q
3.950417934904536
3.1806e-08
au
Orbit Determination Parameters
# obs. used (total)
344
data-arc span
7178 days (19.65 yr)
first obs. used
1999-10-02
last obs. used
2019-05-28
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.56732
source
ORB
producer
Otto Matic
solution date
2019-Sep-24 04:18:53
Additional Information
Earth MOID
= 1.43232 au
Jupiter MOID
= 1.50917 au
T_jup
= 3.104
[ 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
15.2
n/a
MPO258025
diameter
diameter
6.906
km
0.298
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)
geometric albedo
albedo
0.034
0.006
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)
249617 (1999 TP21)
Discovered 1999-Oct-02 by Spacewatch at Kitt Peak
Reference:
20100923/Numbers.arc
Last Updated:
2010-09-27
[ show close-approach data ]
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
2019-Dec-10 00:31 UT
(server date/time)
Site Manager:
Ryan S. Park
Webmaster
:
Alan B. Chamberlin