Asteroids

143404 2003BD44 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.772

Aphelion (Q)

3.163

Eccentricity (e)

0.608

Inclination (i)

2.7

deg

Orbit period (P)

1007.9

Earth MOID

0.01755

U parameter

0.0

Next Earth close approach

Date

2039-07-28

Nominal distance (from Earth center)

0.19815

29643262

Maximum Brightness

20.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

1100 - 2400*

Taxonomic type

Rotation period (T)

78.64

Discovery Information

Discovery Date

2003-01-30

Observatory

Lowell Observatory-LONEOS

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

1.967395

1-sigma variation

2.811E-9

Unit

Eccentricity (e)

Value

0.607734

1-sigma variation

1.018E-8

Unit

Inclination (i)

Value

2.6638

1-sigma variation

2.984E-6

Unit

Long. of Ascending Node (Ω)

Value

181.1628

1-sigma variation

2.910E-5

Unit

Arg. of Perihelion (ω)

Value

89.3954

1-sigma variation

2.915E-5

Unit

Mean Anomaly (M)

Value

25.11463

1-sigma variation

2.627E-6

Unit

Perihelion distance

Value

0.771742

1-sigma variation

Unit

Aphelion distance

Value

3.163049

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.235187

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.245305

1-sigma variation

Unit

MOID

Value

0.017548

1-sigma variation

Unit

Orbit Period

Value

1007.9429

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.90195E-18	3.69852E-18	-5.47917E-16	1.18080E-15	-9.41869E-16	-7.35072E-15
e	3.69852E-18	1.03676E-16	-6.03436E-15	2.40144E-14	1.08557E-15	-3.77388E-15
i	-5.47917E-16	-6.03436E-15	8.90157E-12	5.29138E-11	-5.27420E-11	3.14169E-14
Ω	1.18080E-15	2.40144E-14	5.29138E-11	8.46694E-10	-8.44550E-10	-3.22784E-12
ω	-9.41869E-16	1.08557E-15	-5.27420E-11	-8.44550E-10	8.49693E-10	2.67770E-12
M	-7.35072E-15	-3.77388E-15	3.14169E-14	-3.22784E-12	2.67770E-12	6.90247E-12

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

78.64

Unit

Source

[4]

Quality

Value

Unit

Source

[4]

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

Scomp

Unit

Source

[1]

[2]

Taxonomy (all)

Value

Unit

Source

[3]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

16.964

Unit

mag

Source

[5]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[6]

Diameter

Value

1100 - 2400*

Unit

Source

[6]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[7]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Warner, B.D. (2017) Minor Planet Bul. 44, 223-237. 2.) Sada, P.V. et al. (2018) MPB 45, 122-124. (RESULTS OF THE 2017 MEXICAN ASTEROID PHOTOMETRY CAMPAIGN - PART 1) (.., 143404)
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	Estimation	Estimated from absolute magnitude
[7]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

16093

Unit

Source

[1]

Unobserved

Value

226

Unit

Source

[1]

Normalized RMS of residuals

Value

0.479561

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1981-02-28.49436

Unit

Source

[2]

Last Observation

Value

2025-03-22.197533

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1497 (10)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2017-04-14

Unit

Source

[3]

Last Observation

Value

2017-04-17

Unit

Source

[3]

Delay (Discarded)

Value

3 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

3 (0)

Unit

Source

[1]

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
[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 143404 2003BD44 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	1970-08-26 03:12	< 1 min	0.0551500	0.0551491	0.0000003
EARTH	1981-09-09 01:44	< 1 min	0.1306781	0.1306769	0.0000004
EARTH	2006-04-02 05:48	< 1 s	0.1821466	0.1821461	0.0000002
EARTH	2017-04-18 14:13	< 1 s	0.0557411	0.0557411	0.0000000
EARTH	2039-07-28 04:11	< 1 min	0.1981530	0.1981521	0.0000003
EARTH	2050-09-05 06:31	< 1 min	0.0582878	0.0582854	0.0000008
EARTH	2075-04-14 23:49	< 1 min	0.0195403	0.0195400	0.0000001
MARS	2092-03-20 00:01	1.4	0.0146359	0.0146092	0.0000089
EARTH	2108-08-29 22:59	9.6	0.0479047	0.0477114	0.0000645
EARTH	2119-09-10 02:45	< 1 min	0.0937311	0.0937273	0.0000013

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
323.65821866	100.17774994	0.01765885	MINIMUM
36.82472294	237.08166384	0.01808710	MINIMUM
0.31698270	168.72585271	0.24764140	SADDLE
0.30559410	348.71005441	1.75526698	SADDLE
180.07699182	348.42119827	2.18063265	SADDLE
180.07849774	168.42383172	4.17820751	MAXIMUM

Download:

MOID Plots

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