Asteroids

242450 2004QY2 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.567

Aphelion (Q)

1.601

Eccentricity (e)

0.477

Inclination (i)

37.0

deg

Orbit period (P)

412.2

Earth MOID

0.04657

U parameter

0.0

Next Earth close approach

Date

2029-07-15

Nominal distance (from Earth center)

0.04713

7050043

Maximum Brightness

14.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

14.6

mag

Diameter

3000 - 7000*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-08-20

Observatory

Siding Spring Survey

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.083857

1-sigma variation

2.678E-9

Unit

Eccentricity (e)

Value

0.477165

1-sigma variation

3.597E-8

Unit

Inclination (i)

Value

37.0331

1-sigma variation

6.923E-6

Unit

Long. of Ascending Node (Ω)

Value

295.2734

1-sigma variation

7.210E-6

Unit

Arg. of Perihelion (ω)

Value

104.9871

1-sigma variation

8.265E-6

Unit

Mean Anomaly (M)

Value

49.40780

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.566679

1-sigma variation

Unit

Aphelion distance

Value

1.601035

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.061027

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.238876

1-sigma variation

Unit

MOID

Value

0.046566

1-sigma variation

Unit

Orbit Period

Value

412.1508

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.16943E-18	9.73195E-18	3.11518E-16	2.07885E-15	-1.45654E-15	-1.49724E-14
e	9.73195E-18	1.29376E-15	4.29733E-14	6.62178E-14	-6.89252E-14	1.02285E-13
i	3.11518E-16	4.29733E-14	4.79293E-11	-3.38837E-13	-2.19799E-12	5.78452E-12
Ω	2.07885E-15	6.62178E-14	-3.38837E-13	5.19883E-11	-3.48028E-11	-1.96829E-11
ω	-1.45654E-15	-6.89252E-14	-2.19799E-12	-3.48028E-11	6.83141E-11	-2.19880E-11
M	-1.49724E-14	1.02285E-13	5.78452E-12	-1.96829E-11	-2.19880E-11	7.61543E-11

Date of computation: 2025-07-29 02:36 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

14.599

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

3000 - 7000*

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

7598

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.290321

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-08-20.37478

Unit

Source

[2]

Last Observation

Value

2025-06-08.978443

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

3664 (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

2020-07-08

Unit

Source

[3]

Last Observation

Value

2020-07-08

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

1 (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 242450 2004QY2 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	1950-07-18 21:32	< 1 min	0.0923909	0.0923891	0.0000006
EARTH	1985-07-13 05:58	< 1 min	0.0701252	0.0701238	0.0000005
EARTH	1994-07-19 18:38	< 1 min	0.1086821	0.1086807	0.0000005
EARTH	2020-07-08 11:26	< 1 s	0.1631740	0.1631740	0.0000000
EARTH	2029-07-15 18:04	< 1 s	0.0471266	0.0471264	0.0000001
EARTH	2038-07-22 12:06	< 1 min	0.1718689	0.1718675	0.0000005
EARTH	2064-07-10 20:52	< 1 min	0.1148183	0.1148156	0.0000009
EARTH	2073-07-17 00:30	< 1 min	0.0564804	0.0564787	0.0000006
EARTH	2082-07-22 20:09	< 1 min	0.1789468	0.1789440	0.0000009
EARTH	2108-07-08 11:37	< 1 min	0.1887570	0.1887561	0.0000003
EARTH	2117-07-13 11:41	< 1 s	0.0890130	0.0890126	0.0000001

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
281.51854605	190.92636200	0.04656559	MINIMUM
58.93675070	22.26347152	0.20224561	MINIMUM
351.07036503	285.04587058	0.63959030	SADDLE
170.03334082	113.64572235	0.98655166	SADDLE
353.60614837	110.30627884	1.50047600	SADDLE
184.56373345	304.24863825	2.47682235	MAXIMUM

Download:

MOID Plots

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