Asteroids

2008TZ help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.575

Aphelion (Q)

1.331

Eccentricity (e)

0.397

Inclination (i)

1.5

deg

Orbit period (P)

339.6

Earth MOID

0.00365

U parameter

6.0

Next Earth close approach

Date

2032-06-09

Nominal distance (from Earth center)

0.09009

13477128

Maximum Brightness

22.7

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

2008-10-02

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

0.952641

1-sigma variation

0.000001

Unit

Eccentricity (e)

Value

0.396693

1-sigma variation

0.000200

Unit

Inclination (i)

Value

1.5031

1-sigma variation

0.0009

Unit

Long. of Ascending Node (Ω)

Value

9.6292

1-sigma variation

0.0065

Unit

Arg. of Perihelion (ω)

Value

127.6050

1-sigma variation

0.0121

Unit

Mean Anomaly (M)

Value

67.26277

1-sigma variation

0.38030

Unit

Perihelion distance

Value

0.574735

1-sigma variation

Unit

Aphelion distance

Value

1.330547

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.058313

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.353856

1-sigma variation

Unit

MOID

Value

0.003646

1-sigma variation

Unit

Orbit Period

Value

339.6194

1-sigma variation

Unit

U parameter

Value

6.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.28209E-12	2.26279E-10	1.07436E-9	-7.34795E-9	1.36693E-8	-4.30465E-7
e	2.26279E-10	3.99366E-8	1.89613E-7	-1.29692E-6	2.41257E-6	-7.59772E-5
i	1.07436E-9	1.89613E-7	9.00824E-7	-6.15487E-6	1.14525E-5	-3.60643E-4
Ω	-7.34795E-9	-1.29692E-6	-6.15487E-6	4.21513E-5	-7.83679E-5	2.46894E-3
ω	1.36693E-8	2.41257E-6	1.14525E-5	-7.83679E-5	1.45756E-4	-4.59068E-3
M	-4.30465E-7	-7.59772E-5	-3.60643E-4	2.46894E-3	-4.59068E-3	1.44627E-1

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

25.425

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

[-]

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

6196

Unit

Source

[1]

Normalized RMS of residuals

Value

0.501556

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2008-09-30.5412

Unit

Source

[2]

Last Observation

Value

2008-10-10.04582

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

86 (4)

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 2008TZ 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	1958-10-11 03:19	193.5	0.0109764	0.0026039	0.0093387
VENUS	1961-08-28 06:49	452.6	0.0281707	0.0252121	0.0023140
VENUS	1963-07-04 22:36	174.6	0.0264098	0.0251671	0.0006318
VENUS	1965-05-10 23:03	46.2	0.0389221	0.0386908	0.0000771
EARTH	1968-06-15 03:26	603.1	0.1484248	0.1399554	0.0028253
EARTH	1970-10-06 12:11	702.6	0.1391669	0.1278773	0.0037632
EARTH	1980-06-10 20:07	345.3	0.0396026	0.0258376	0.0073320
EARTH	1983-10-08 07:38	393.1	0.1005658	0.0757245	0.0082819
VENUS	1987-09-28 23:48	865.3	0.0437423	0.0373555	0.0038616
VENUS	1989-08-05 20:42	590.1	0.0402331	0.0373276	0.0025882
EARTH	1993-06-21 05:21	> 1 d	0.1824688	0.1682184	0.0047537
EARTH	1995-10-08 20:26	630.8	0.1237402	0.1098069	0.0046448
EARTH	2005-06-13 19:12	105.5	0.1163315	0.1098099	0.0021773
EARTH	2008-10-10 22:00	< 1 s	0.0134695	0.0134455	0.0000080
EARTH	2018-06-16 17:42	174.5	0.1977808	0.1882463	0.0031794
EARTH	2021-10-05 10:53	1000.5	0.1498027	0.1358801	0.0046413
VENUS	2027-06-28 08:33	867.5	0.0280519	0.0245371	0.0035903
EARTH	2032-06-09 10:49	484.8	0.0900890	0.0592478	0.0105163
EARTH	2035-10-06 23:13	723.4	0.1414866	0.0972628	0.0147433
VENUS	2036-12-18 13:31	> 1 d	0.0424370	0.0376226	0.0079098
EARTH	2045-06-10 23:22	821.5	0.0494464	0.0244885	0.0171598
EARTH	2048-10-11 07:27	255.2	0.0222205	0.0043691	0.0176131
EARTH	2059-06-09 13:07	577.8	0.0440400	0.0243221	0.0685795
VENUS	2061-12-12 05:00	> 1 w	0.0467222	0.0250909	0.0882254
EARTH	2062-10-10 04:16	> 1 d	0.0462632	0.0046528	0.0891917
VENUS	2069-07-27 16:36	442.1	0.0440379	0.0383639	0.0040887
EARTH	2073-06-20 22:36	> 1 w	0.1868171	0.0494485	0.0472526
EARTH	2075-09-28 14:36	> 1 w	0.1918866	0.0124523	0.0725196
EARTH	2086-06-12 17:23	> 1 w	0.0955174	0.0242293	0.2144561
EARTH	2089-10-11 00:32	> 1 w	0.0942755	0.0053316	0.2313328
VENUS	2092-09-10 19:45	> 1 w	0.0259042	0.0242715	0.0931513
VENUS	2100-04-29 13:21	> 1 mo	0.0389486	0.0380344	0.1437347
EARTH	2100-06-10 02:06	> 1 d	0.0384912	0.0239590	0.4307376
EARTH	2103-10-11 05:30	> 1 w	0.0548796	0.0054950	0.9493526
EARTH	2113-06-16 07:54	> 1 mo	0.1651551	0.0243282	0.8750913
EARTH	2116-10-08 11:59	> 1 mo	0.1348031	0.0050986	0.7847680

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
263.08019456	276.32913246	0.00364877	MINIMUM
99.31676942	156.26368059	0.02498543	MINIMUM
180.82411983	215.94705563	0.31858277	SADDLE
2.14449301	37.27675294	0.41222014	SADDLE
2.29236099	217.47166123	1.58783249	SADDLE
180.96345564	36.02852058	2.31741128	MAXIMUM

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MOID Plots

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