Asteroids

2007JB21 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

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

0.00042

U parameter

6.9

Next Earth close approach

Date

2053-05-10

Nominal distance (from Earth center)

0.08199

12266261

Maximum Brightness

23.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.4

mag

Diameter

22 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2007-05-12

Observatory

Lincoln Laboratory ETS, New Mexico

ORBIT VISUALISATION TOOLS

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.985920

1-sigma variation

0.000085

Unit

Eccentricity (e)

Value

0.108761

1-sigma variation

0.000190

Unit

Inclination (i)

Value

13.4433

1-sigma variation

0.0303

Unit

Long. of Ascending Node (Ω)

Value

227.8249

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

250.7481

1-sigma variation

0.0691

Unit

Mean Anomaly (M)

Value

73.56709

1-sigma variation

1.03481

Unit

Perihelion distance

Value

0.878690

1-sigma variation

Unit

Aphelion distance

Value

1.093149

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.000444

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.049849

1-sigma variation

Unit

MOID

Value

0.000418

1-sigma variation

Unit

Orbit Period

Value

357.5697

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.29673E-9	1.62142E-8	2.59010E-6	1.30288E-8	5.89957E-6	-8.83945E-5
e	1.62142E-8	3.60812E-8	5.76317E-6	2.76292E-8	1.31129E-5	-1.96431E-4
i	2.59010E-6	5.76317E-6	9.20557E-4	4.42400E-6	2.09465E-3	-3.13783E-2
Ω	1.30288E-8	2.76292E-8	4.42400E-6	6.85111E-8	1.04495E-5	-1.57648E-4
ω	5.89957E-6	1.31129E-5	2.09465E-3	1.04495E-5	4.77016E-3	-7.14695E-2
M	-8.83945E-5	-1.96431E-4	-3.13783E-2	-1.57648E-4	-7.14695E-2	1.07084E0

Date of computation: 2025-09-10 00:30 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

25.398

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

22 - 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 Aegis	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

6734

Unit

Source

[1]

Normalized RMS of residuals

Value

0.52609

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

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

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 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	2003-05-15 16:03	20.3	0.1844012	0.1831285	0.0004242
EARTH	2004-05-12 13:29	21.6	0.1247503	0.1233782	0.0004574
EARTH	2005-05-10 19:29	21.6	0.0689331	0.0674837	0.0004831
EARTH	2006-05-09 12:21	19.4	0.0204931	0.0190690	0.0004747
EARTH	2007-05-09 00:03	< 1 min	0.0041562	0.0041262	0.0000100
EARTH	2008-05-07 17:27	45.0	0.1263092	0.1236613	0.0008827
EARTH	2008-11-26 19:54	334.1	0.1572772	0.1513499	0.0019894
EARTH	2009-11-09 16:08	513.1	0.0555004	0.0515322	0.0015390
EARTH	2010-10-29 02:48	526.3	0.1022307	0.0916385	0.0035997
EARTH	2053-05-10 16:43	> 1 d	0.0819949	0.0014175	0.0371108
EARTH	2054-05-08 01:11	639.1	0.0383651	0.0014902	0.0341250
EARTH	2055-05-09 18:33	810.8	0.1662756	0.1022912	0.0213943
EARTH	2055-11-20 06:24	> 1 d	0.1174917	0.0777862	0.0138081
EARTH	2056-11-04 02:34	69.7	0.0511989	0.0471181	0.0016088
EARTH	2057-10-23 15:06	> 1 d	0.1582594	0.1276436	0.0102597
EARTH	2097-05-10 05:40	> 1 w	0.0691743	0.0009393	0.4778599
EARTH	2098-05-07 17:24	> 1 d	0.0583589	0.0015050	0.4283217
EARTH	2099-05-11 01:21	> 1 w	0.1894898	0.0230450	0.3209993
EARTH	2099-11-16 10:40	> 1 mo	0.0945667	0.0493452	0.2323094
EARTH	2100-11-02 04:29	> 1 w	0.0675991	0.0544619	0.0980839
EARTH	2101-10-21 23:27	1428.3	0.1902119	0.1059128	0.0466959

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
103.14670100	124.74089732	0.00112247	MINIMUM
291.07185630	302.41744989	0.04676629	MINIMUM
16.33737540	33.90787810	0.24162948	SADDLE
197.96659429	212.87681063	0.25638904	SADDLE
7.10656964	203.51643354	1.88195367	SADDLE
176.99021371	13.28901101	2.06489986	MAXIMUM

Download:

MOID Plots

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