+ View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Small-Body Database Browser
Search:
[
help
]
19918 (1977 PB)
Classification:
Main-belt Asteroid
SPK-ID:
2019918
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference:
JPL 34
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.1340317455761135
2.7214e-08
a
2.649082093845174
1.0261e-08
au
q
2.294020996632679
7.0079e-08
au
i
13.54735056941216
4.2235e-06
deg
node
132.1565027817047
1.2574e-05
deg
peri
112.8834148517323
2.1232e-05
deg
M
36.15480237714739
1.5962e-05
deg
t
p
2458842.336945454707
(2019-Dec-24.83694545)
6.9802e-05
TDB
period
1574.858549698366
4.31
9.1502e-06
2.505e-08
d
yr
n
.2285919583501332
1.3282e-09
deg/d
Q
3.004143191057668
1.1636e-08
au
Orbit Determination Parameters
# obs. used (total)
2308
data-arc span
15808 days (43.28 yr)
first obs. used
1977-08-06
last obs. used
2020-11-16
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.44085
source
ORB
producer
Otto Matic
solution date
2020-Dec-18 03:12:22
Additional Information
Earth MOID
= 1.31831 au
Jupiter MOID
= 2.1791 au
T_jup
= 3.339
[ hide covariance matrix ]
Orbital Elements at Epoch 2457630.5 (2016-Aug-30.0) TDB
Reference:
JPL 34
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.132934698287758
2.727e-08
q
2.296397073225841
7.0043e-08
au
t
p
2457267.608270471447
(2015-Sep-02.10827047)
7.0695e-05
TDB
node
132.1919530175369
1.2583e-05
deg
peri
112.7214651411252
2.1338e-05
deg
i
13.54238038916723
4.2221e-06
deg
Orbit Determination Parameters
# obs. used (total)
2308
data-arc span
15808 days (43.28 yr)
first obs. used
1977-08-06
last obs. used
2020-11-16
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.44085
source
ORB
producer
Otto Matic
solution date
2020-Dec-18 03:12:22
Additional Information
Jupiter MOID
= 2.1791 au
T_jup
= 3.339
Orbit Covariance (6×6)
e
q
tp
node
peri
i
e
7.436310918413321E-16
-1.895932858136946E-15
1.725004334693481E-13
-1.042068905455097E-15
3.527730974482619E-14
-7.76524895813545E-16
q
-1.895932858136946E-15
4.906003586706158E-15
-5.20113583035745E-13
2.171834425632567E-15
-1.038891958324381E-13
1.778820714527314E-15
tp
1.725004334693481E-13
-5.20113583035745E-13
4.997798478815051E-9
-1.714487836707009E-11
1.224134959218476E-9
3.957500334353081E-12
node
-1.042068905455097E-15
2.171834425632567E-15
-1.714487836707009E-11
1.583207327409337E-10
-1.577544343171562E-10
3.921587821343664E-12
peri
3.527730974482619E-14
-1.038891958324381E-13
1.224134959218476E-9
-1.577544343171562E-10
4.553142936747873E-10
-2.91486693640768E-12
i
-7.76524895813545E-16
1.778820714527314E-15
3.957500334353081E-12
3.921587821343664E-12
-2.91486693640768E-12
1.782598188912051E-11
[
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
13.1
n/a
MPO474028
diameter
diameter
7.546
km
0.117
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
rotation period
rot_per
7.6897
h
n/a
LCDB (Rev. 2020-October); Warner et al., 2009
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Clark, M. (2016) Minor Planet Bull. 43, 2-5.]
geometric albedo
albedo
0.200
0.037
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
19918 (1977 PB)
Discovered 1977-Aug-06 by Lagerkvist, C.-I. at Mount Stromlo
Reference:
20010109/Numbers.arc
Last Updated:
2004-04-19
[ show close-approach data ]
Alternate Designations
1977 PB
= 1990 KE2 = 1990 SO18 = 1998 KV60
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
2021-Jan-27 20:59 UT
(server date/time)
Site Manager:
Ryan S. Park
Webmaster
:
Alan B. Chamberlin