Asteroids

163249 2002GT

Last update: 2023-06-01 00:01 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.894

Aphelion (Q)

1.795

Eccentricity (e)

0.335

Inclination (i)

7.0

deg

Orbit period (P)

569.3

Earth MOID

0.01635

U parameter

0.0

Next Earth close approach

Date

2027-08-16

Nominal distance (from Earth center)

0.14956

22374290

Maximum Brightness

120.4

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

18.5

mag

Diameter

700*

Taxonomic type

Rotation period (T)

3.766

Discovery Information

Discovery Date

2002-04-03

Observatory

LPL/Spacewatch II

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.344367

1-sigma variation

1.475E-9

Unit

Eccentricity (e)

Value

0.334857

1-sigma variation

2.047E-8

Unit

Inclination (i)

Value

6.9698

1-sigma variation

9.804E-7

Unit

Ascending Node (Ω)

Value

201.7376

1-sigma variation

1.795E-5

Unit

Arg. of Perihelion (ω)

Value

135.1420

1-sigma variation

1.640E-5

Unit

Mean Anomaly (M)

Value

40.50147

1-sigma variation

4.131E-6

Unit

Perihelion

Value

0.894196

1-sigma variation

Unit

Aphelion

Value

1.794537

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.563022

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.033610

1-sigma variation

Unit

MOID

Value

0.016348

1-sigma variation

Unit

Orbit Period

Value

569.3443

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.17485E-18	-2.33372E-18	1.24722E-16	4.31883E-15	-4.47997E-15	-5.74756E-15
e	-2.33372E-18	4.19013E-16	8.44049E-15	3.05605E-14	2.40372E-14	3.49928E-16
i	1.24722E-16	8.44049E-15	9.61192E-13	1.56857E-11	-1.34909E-11	-9.72411E-13
Ω	4.31883E-15	3.05605E-14	1.56857E-11	3.22043E-10	-2.90357E-10	-2.79260E-11
ω	-4.47997E-15	2.40372E-14	-1.34909E-11	-2.90357E-10	2.69024E-10	2.57329E-11
M	-5.74756E-15	3.49928E-16	-9.72411E-13	-2.79260E-11	2.57329E-11	1.70655E-11

Date of computation: 2023-05-08 23:50 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

3.766

Unit

Source

[3]

Quality

Value

3,B

Unit

Source

[3]

Amplitude

Value

0.36

Unit

mag

Source

[3]

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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.484

18.71

Unit

mag

Source

[4]

[5]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[4]

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

700*

Unit

Source

[7]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.303

0.49

0.924

Unit

R-I

V-R

B-V

Source

[8]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Visual S

Unit

Source

[9]

[10]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Hicks, M. et al. (2013) href="http://www.astronomerstelegram.org/?read=5132"> ATel#5132 (Palomar Spectroscopy of Near-Earth Asteroids 137199 (1999 KX4), 152756 (1999 JV3), 163249 (2002 GT), 163364 (2002 OD20), and 285263 (1998 QE2))
[2]	EARN	1.) Hicks, M. et al. (2013) href="http://www.astronomerstelegram.org/?read=5132"> ATel#5132 (Palomar Spectroscopy of Near-Earth Asteroids 137199 (1999 KX4), 152756 (1999 JV3), 163249 (2002 GT), 163364 (2002 OD20), and 285263 (1998 QE2)) 2.) Pittichova, J. et al. (2013) DPS 45, 101-06. (abstract) (Physical Characterization of Deep Impact Flyby Target (163249) 2002 GT)
[3]	EARN	1.) Pittichova, J. et al. (2013) DPS 45, 101-06. (abstract) (Physical Characterization of Deep Impact Flyby Target (163249) 2002 GT) 2.) Franco, L. et al. (2013) MPB 40, 205. (LIGHTCURVE OF THE POTENTIALLY HAZARDOUS ASTEROID (163249) 2002 GT) 3.) Bacci, P. et al. (2013) priv.comm. href="http://backman.altervista.org/Aimg/2002GT_LC.png"> Phased plot of 163249 2002 GT
[4]	ESA ODIM	ESA orbit determination and impact monitoring system
[5]	EARN	1.) Pittichova, J. et al. (2013) DPS 45, 101-06. (abstract) (Physical Characterization of Deep Impact Flyby Target (163249) 2002 GT)
[6]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[7]	Estimation	Estimated from absolute magnitude
[8]	EARN	1.) Lin, C-H. et al. (2018) P&SS 152, 116-135. (Photometric survey and taxonomic identifications of 92 near-Earth asteroids)
[9]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage
[10]	EARN	1.) Hicks, M. et al. (2013) href="http://www.astronomerstelegram.org/?read=5132"> ATel#5132 (Palomar Spectroscopy of Near-Earth Asteroids 137199 (1999 KX4), 152756 (1999 JV3), 163249 (2002 GT), 163364 (2002 OD20), and 285263 (1998 QE2)) 2.) Lim, L.F. et al. (2014) LPSC 45, 1695. (Thermal Emission Photometry of Three Near-Earth Asteroids in L' and M')(163249,277475,137126)

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

7253

Unit

Source

[1]

Unobserved

Value

476

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.423411

Unit

arcsec

Source

[1]

First Observation

Value

2002-04-03.36152

Unit

Source

[2]

Last Observation

Value

2022-02-10.414971

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1549 (5)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2013-06-01

Unit

Source

[3]

Last Observation

Value

2013-06-13

Unit

Source

[3]

Delay (Discarded)

Value

5 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

5 (0)

Unit

Source

[1]

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

Sources

No.	Name	Additional
[1]	ESA ODIM	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 163249 2002GT from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1960-06-17 03:15	< 1 min	0.1650529	0.1650519	0.0000003
EARTH	1963-11-06 02:13	< 1 min	0.1900186	0.1900174	0.0000004
EARTH	1974-08-04 09:31	< 1 min	0.1484154	0.1484153	0.0000000
EARTH	1988-10-14 13:53	< 1 min	0.0459328	0.0459324	0.0000001
EARTH	2002-10-30 23:49	< 1 s	0.0977486	0.0977483	0.0000001
EARTH	2013-06-26 13:05	< 1 s	0.1201943	0.1201943	0.0000000
EARTH	2027-08-16 21:22	< 1 min	0.1495629	0.1495628	0.0000000
EARTH	2041-10-07 20:55	< 1 min	0.0745804	0.0745797	0.0000002
EARTH	2055-10-25 20:04	< 1 min	0.0336004	0.0336000	0.0000001
EARTH	2066-06-30 02:37	< 1 min	0.1203362	0.1203361	0.0000000
EARTH	2080-09-23 09:03	< 1 min	0.1108854	0.1108834	0.0000007
EARTH	2094-11-02 15:01	< 1 min	0.1258864	0.1258820	0.0000015
EARTH	2105-07-25 22:39	< 1 min	0.1421818	0.1421811	0.0000003
EARTH	2119-10-17 05:19	< 1 min	0.0452414	0.0452403	0.0000004

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