Asteroids

2004TN1 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.841

Aphelion (Q)

4.673

Eccentricity (e)

0.695

Inclination (i)

8.4

deg

Orbit period (P)

1672.0

Earth MOID

0.00627

U parameter

7.5

Next Earth close approach

Date

2036-10-26

Nominal distance (from Earth center)

0.01053

1575773

Maximum Brightness

13.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.7

mag

Diameter

120 - 280*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-10-05

Observatory

Palomar Mountain/NEAT

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

2.756876

1-sigma variation

0.001757

Unit

Eccentricity (e)

Value

0.695063

1-sigma variation

0.000322

Unit

Inclination (i)

Value

8.3879

1-sigma variation

0.0010

Unit

Long. of Ascending Node (Ω)

Value

213.5444

1-sigma variation

0.0171

Unit

Arg. of Perihelion (ω)

Value

233.9863

1-sigma variation

0.0188

Unit

Mean Anomaly (M)

Value

210.29130

1-sigma variation

1.09770

Unit

Perihelion distance

Value

0.840672

1-sigma variation

Unit

Aphelion distance

Value

4.673080

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.403291

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.017432

1-sigma variation

Unit

MOID

Value

0.006274

1-sigma variation

Unit

Orbit Period

Value

1671.9538

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.08626E-6	5.65896E-7	1.69440E-6	-3.00729E-5	3.29589E-5	-1.92841E-3
e	5.65896E-7	1.03763E-7	3.10730E-7	-5.51418E-6	6.04357E-6	-3.53593E-4
i	1.69440E-6	3.10730E-7	9.38786E-7	-1.65169E-5	1.81340E-5	-1.05872E-3
Ω	-3.00729E-5	-5.51418E-6	-1.65169E-5	2.93043E-4	-3.21183E-4	1.87907E-2
ω	3.29589E-5	6.04357E-6	1.81340E-5	-3.21183E-4	3.52167E-4	-2.05939E-2
M	-1.92841E-3	-3.53593E-4	-1.05872E-3	1.87907E-2	-2.05939E-2	1.20494E0

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

21.667

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

120 - 280*

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

[-]

Download this part as:

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

7652

Unit

Source

[1]

Normalized RMS of residuals

Value

0.747586

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-10-05.17486

Unit

Source

[2]

Last Observation

Value

2004-11-04.08947

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

65 (1)

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 2004TN1 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	1959-01-19 11:31	> 1 mo	0.1802005	0.1737543	0.0534946
EARTH	2004-11-16 16:42	< 1 min	0.0935430	0.0934761	0.0000223
EARTH	2036-10-26 15:06	> 1 w	0.0105334	0.0023074	0.1391668
EARTH	2046-02-16 10:53	> 1 mo	0.1825316	0.1279840	4.3589152
EARTH	2068-12-13 21:43	> 1 mo	0.1815292	0.1123072	5.3578959
EARTH	2078-02-12 12:11	> 1 mo	0.1179296	0.1175767	2.1610384
EARTH	2109-11-10 01:48	> 1 mo	0.0733599	0.0555477	38.4209976

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
336.80633673	294.47696254	0.00628746	MINIMUM
22.82794049	35.79671160	0.13976689	MINIMUM
3.76040950	354.00444209	0.18262237	SADDLE
0.03465750	165.36639042	1.85318351	SADDLE
180.11320640	164.99184185	3.66644887	SADDLE
179.84162876	344.87756177	5.65167114	MAXIMUM

Download:

MOID Plots

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