Asteroids

2007JB21 help

Last update: 2024-04-26 12:37 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.879

Aphelion (Q)

1.093

Eccentricity (e)

0.109

Inclination (i)

13.4

deg

Orbit period (P)

357.6

Earth MOID

0.00097

U parameter

6.9

Next Earth close approach

Date

2053-05-10

Nominal distance (from Earth center)

0.08199

12264923

Maximum Brightness

23.3

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.5

mag

Diameter

21 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2007-05-12

Observatory

Lincoln Laboratory ETS, New Mexico

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.985912

1-sigma variation

0.000085

Unit

Eccentricity (e)

Value

0.108807

1-sigma variation

0.000190

Unit

Inclination (i)

Value

13.4434

1-sigma variation

0.0303

Unit

Long. of Ascending Node (Ω)

Value

227.8308

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

250.7510

1-sigma variation

0.0671

Unit

Mean Anomaly (M)

Value

189.48697

1-sigma variation

0.95484

Unit

Perihelion distance

Value

0.878638

1-sigma variation

Unit

Aphelion distance

Value

1.093186

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.001045

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.048999

1-sigma variation

Unit

MOID

Value

0.000970

1-sigma variation

Unit

Orbit Period

Value

357.5655

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.30562E-9	1.62220E-8	2.59219E-6	2.88593E-8	5.73536E-6	-8.16130E-5
e	1.62220E-8	3.60720E-8	5.76358E-6	6.27594E-8	1.27386E-5	-1.81228E-4
i	2.59219E-6	5.76358E-6	9.20922E-4	1.00390E-5	2.03552E-3	-2.89592E-2
Ω	2.88593E-8	6.27594E-8	1.00390E-5	1.59298E-7	2.25723E-5	-3.22212E-4
ω	5.73536E-6	1.27386E-5	2.03552E-3	2.25723E-5	4.50283E-3	-6.40717E-2
M	-8.16130E-5	-1.81228E-4	-2.89592E-2	-3.22212E-4	-6.40717E-2	9.11721E-1

Date of computation: 2024-04-23 10:08 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

25.539

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

21 - 50*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

6188

Unit

Source

[1]

Normalized RMS of residuals

Value

0.526093

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2007-05-12.31607

Unit

Source

[2]

Last Observation

Value

2007-05-18.96258

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (0)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close approaches for 2007JB21 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	2003-05-15 16:03	20.3	0.1844013	0.1831286	0.0004243
EARTH	2004-05-12 13:29	21.6	0.1247505	0.1233783	0.0004574
EARTH	2005-05-10 19:29	21.6	0.0689333	0.0674839	0.0004832
EARTH	2006-05-09 12:21	19.4	0.0204934	0.0190693	0.0004747
EARTH	2007-05-09 00:03	< 1 min	0.0041562	0.0041262	0.0000100
EARTH	2008-05-07 17:27	45.0	0.1263094	0.1236615	0.0008827
EARTH	2008-11-26 19:54	334.1	0.1572769	0.1513497	0.0019894
EARTH	2009-11-09 16:08	513.1	0.0555002	0.0515321	0.0015390
EARTH	2010-10-29 02:48	526.3	0.1022314	0.0916391	0.0035997
EARTH	2053-05-10 16:42	> 1 d	0.0819859	0.0014175	0.0371110
EARTH	2054-05-08 01:11	639.0	0.0383733	0.0014903	0.0341245
EARTH	2055-05-09 18:33	811.0	0.1662807	0.1022875	0.0213973
EARTH	2055-11-20 06:24	> 1 d	0.1174887	0.0777723	0.0138126
EARTH	2056-11-04 02:34	68.3	0.0511984	0.0471330	0.0016051
EARTH	2057-10-23 15:07	> 1 d	0.1582566	0.1276769	0.0102475
EARTH	2097-05-10 05:45	> 1 w	0.0692903	0.0009395	0.4777125
EARTH	2098-05-07 17:26	> 1 d	0.0582550	0.0015017	0.4283543
EARTH	2099-05-11 01:13	> 1 w	0.1894119	0.0230169	0.3210307
EARTH	2099-11-16 10:53	> 1 mo	0.0946233	0.0493584	0.2323457
EARTH	2100-11-02 04:33	> 1 w	0.0675752	0.0544609	0.0980260
EARTH	2101-10-21 23:27	1428.9	0.1902004	0.1059091	0.0467048

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