Asteroids

2001BA16 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.811

Aphelion (Q)

1.069

Eccentricity (e)

0.137

Inclination (i)

5.8

deg

Orbit period (P)

332.9

Earth MOID

0.00047

U parameter

5.4

Next Earth close approach

Date

2032-01-17

Nominal distance (from Earth center)

0.01939

2899962

Maximum Brightness

20.2

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

16 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2001-01-19

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

0.940045

1-sigma variation

0.000005

Unit

Eccentricity (e)

Value

0.137439

1-sigma variation

0.000082

Unit

Inclination (i)

Value

5.7757

1-sigma variation

0.0040

Unit

Long. of Ascending Node (Ω)

Value

115.2615

1-sigma variation

0.0009

Unit

Arg. of Perihelion (ω)

Value

243.1479

1-sigma variation

0.0032

Unit

Mean Anomaly (M)

Value

193.23246

1-sigma variation

0.22123

Unit

Perihelion distance

Value

0.810847

1-sigma variation

Unit

Aphelion distance

Value

1.069244

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.000761

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.149210

1-sigma variation

Unit

MOID

Value

0.000474

1-sigma variation

Unit

Orbit Period

Value

332.9060

1-sigma variation

Unit

U parameter

Value

5.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.78672E-11	-4.30612E-10	-2.11443E-8	-4.79595E-9	-1.70868E-8	-1.16786E-6
e	-4.30612E-10	6.65758E-9	3.26914E-7	7.38848E-8	2.64364E-7	1.80454E-5
i	-2.11443E-8	3.26914E-7	1.60531E-5	3.62731E-6	1.29814E-5	8.86079E-4
Ω	-4.79595E-9	7.38848E-8	3.62731E-6	8.63430E-7	2.92069E-6	2.01005E-4
ω	-1.70868E-8	2.64364E-7	1.29814E-5	2.92069E-6	1.05080E-5	7.16007E-4
M	-1.16786E-6	1.80454E-5	8.86079E-4	2.01005E-4	7.16007E-4	4.89431E-2

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

26.152

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

16 - 30*

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

8964

Unit

Source

[1]

Normalized RMS of residuals

Value

0.605058

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-01-19.34208

Unit

Source

[2]

Last Observation

Value

2001-02-28.49355

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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 2001BA16 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	1960-01-17 11:29	> 1 d	0.0158445	0.0003226	0.0564595
EARTH	1960-10-02 23:06	> 1 mo	0.1820895	0.1820524	0.0002047
EARTH	1961-07-07 16:11	> 1 w	0.0902855	0.0667181	0.0328557
EARTH	1981-01-17 19:19	> 1 d	0.0413590	0.0029261	0.0129065
EARTH	1981-09-22 21:30	> 1 w	0.1816310	0.1783257	0.0012100
EARTH	1982-06-25 03:16	> 1 d	0.0679722	0.0594699	0.0053927
EARTH	2001-01-15 20:29	< 1 min	0.0020469	0.0020428	0.0000014
EARTH	2001-08-11 03:57	86.3	0.1853706	0.1850202	0.0001168
EARTH	2011-01-18 16:34	70.4	0.1819646	0.1755140	0.0021502
EARTH	2012-05-18 11:16	145.4	0.1158802	0.1118226	0.0013817
EARTH	2021-11-12 17:57	> 1 d	0.1750221	0.1701567	0.0016241
EARTH	2022-03-21 14:52	> 1 d	0.1201786	0.1189905	0.0004198
EARTH	2022-06-23 23:57	> 1 d	0.1198509	0.1156058	0.0014946
EARTH	2032-01-17 10:53	472.2	0.0193850	0.0076798	0.0039023
EARTH	2032-08-02 06:49	19.7	0.1805446	0.1777903	0.0009195
EARTH	2042-02-15 17:31	> 1 w	0.0973922	0.0518636	0.0299235
EARTH	2042-07-09 03:42	> 1 mo	0.1476672	0.1262377	0.0228876
EARTH	2051-10-23 23:52	> 1 mo	0.1971366	0.1344252	0.0212129
EARTH	2052-05-29 18:29	> 1 w	0.0932727	0.0887161	0.0260767
EARTH	2062-05-14 20:36	> 1 d	0.1301676	0.0884784	0.1051988
EARTH	2071-01-15 03:46	554.2	0.0415334	0.0000897	0.1469684
EARTH	2071-08-18 22:19	> 1 mo	0.1958933	0.1625020	0.0298252
EARTH	2081-01-14 16:59	1101.6	0.0389399	0.0004502	0.4814898
EARTH	2081-08-20 10:19	> 1 mo	0.1953048	0.1662552	0.0944583
EARTH	2091-01-18 16:04	> 1 w	0.1867180	0.0016767	1.2566439
EARTH	2092-05-18 04:33	> 1 mo	0.1154067	0.0853414	0.9482101
EARTH	2101-11-01 01:44	> 1 mo	0.1889622	0.0133735	0.8085896
EARTH	2102-06-12 00:45	> 1 mo	0.1017710	0.0902014	1.1521962
EARTH	2112-02-05 05:16	> 1 mo	0.0834618	0.0270623	2.8198656
EARTH	2112-07-19 11:16	> 1 mo	0.1579372	0.1331229	1.4593199
EARTH	2122-01-16 01:47	> 1 mo	0.0087534	0.0016371	2.1395650
EARTH	2122-08-26 16:46	> 1 mo	0.1906488	0.1906356	0.0413980
EARTH	2123-05-20 03:32	> 1 mo	0.1860170	0.0736837	18.5509091

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
109.77338681	13.00421875	0.00051733	MINIMUM
254.23257312	142.50474671	0.08550206	MINIMUM
190.89249513	84.71307579	0.12055275	SADDLE
0.38852475	257.64462889	0.20911716	SADDLE
353.30985247	69.43906781	1.80419767	SADDLE
173.10471324	249.21153789	2.07196217	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2001BA16

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2040-01-15.791	66168.791	4.161	2.25 ± 0.005	2.77E4	6.67E-9	3.00E-1	-8.26
2041-01-15.062	66534.062	3.229	1.34 ± 0.004	7.22E3	1.27E-6	2.99E-1	-6.00
2051-01-15.437	70186.437	-3.499	2.36 ± 0.008	2.79E4	8.32E-8	3.00E-1	-7.40


Based on 21 optical observations (of which 0 are rejected as outliers) from 2001/01/19.342 to 2001/02/28.494.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.48 and 2.49 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: