Asteroids

235756 2004VC help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.840

Aphelion (Q)

1.427

Eccentricity (e)

0.259

Inclination (i)

39.1

deg

Orbit period (P)

440.7

Earth MOID

0.03507

U parameter

0.0

Next Earth close approach

Date

2027-10-02

Nominal distance (from Earth center)

0.16739

25041204

Maximum Brightness

17.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.6

mag

Diameter

1136

Taxonomic type

Rotation period (T)

7.180

Discovery Information

Discovery Date

2004-11-01

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.133414

1-sigma variation

2.263E-9

Unit

Eccentricity (e)

Value

0.258885

1-sigma variation

4.895E-8

Unit

Inclination (i)

Value

39.1436

1-sigma variation

1.422E-5

Unit

Long. of Ascending Node (Ω)

Value

194.1494

1-sigma variation

3.649E-6

Unit

Arg. of Perihelion (ω)

Value

94.1832

1-sigma variation

8.128E-6

Unit

Mean Anomaly (M)

Value

224.56089

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.839990

1-sigma variation

Unit

Aphelion distance

Value

1.426838

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.076384

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.038163

1-sigma variation

Unit

MOID

Value

0.035074

1-sigma variation

Unit

Orbit Period

Value

440.7388

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.12013E-18	-2.03214E-17	-7.42371E-15	3.64416E-16	3.71724E-15	-2.61171E-14
e	-2.03214E-17	2.39657E-15	1.32222E-13	3.81988E-15	6.06790E-14	2.50150E-13
i	-7.42371E-15	1.32222E-13	2.02310E-10	6.25791E-12	-3.28115E-12	4.18418E-11
Ω	3.64416E-16	3.81988E-15	6.25791E-12	1.33139E-11	2.64411E-12	-1.66696E-11
ω	3.71724E-15	6.06790E-14	-3.28115E-12	2.64411E-12	6.60579E-11	-5.71559E-11
M	-2.61171E-14	2.50150E-13	4.18418E-11	-1.66696E-11	-5.71559E-11	1.86851E-10

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

7.180

Unit

Source

[5]

Quality

Value

Unit

Source

[5]

Amplitude

Value

0.12

Unit

mag

Source

[5]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

S/Sr

Unit

Source

[1]

[2]

Taxonomy (all)

Value

Sr/S

Unit

Source

[3]

[4]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.59

Unit

mag

Source

[6]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.042

Unit

Source

[8]

Diameter

Value

1136

Unit

Source

[7]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.1656

0.2292

-0.175

Unit

g-r

g-i

r-i

Source

[1]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[9]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) A. V. Sergeyev, B. Carry et al A&A, 658 (2022) A109
[2]	EARN	1.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Thomas, C.A. et al. (2011) Astron. J. 142, 85. (ExploreNEOs. V. AVERAGE ALBEDO BY TAXONOMIC COMPLEX IN THE NEAR-EARTH ASTEROID POPULATION) (new albedos data for 118 NEOs) 2.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects) 3.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[5]	EARN	1.) Warner, B.D. (2015) MPB 42, 256-266. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2015 MARCH-JUNE)(35 NEAs)
[6]	ESA Aegis	ESA orbit determination and impact monitoring system
[7]	EARN	1.) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs) 2.) Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; et al. (2011) Astrophys. J. 741, A90. See also Grav 2012b and Masiero 2012.
[8]	EARN	1.) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs) 2.) Thomas, C.A. et al. (2011) Astron. J. 142, 85. (ExploreNEOs. V. AVERAGE ALBEDO BY TAXONOMIC COMPLEX IN THE NEAR-EARTH ASTEROID POPULATION) (new albedos data for 118 NEOs) 3.) Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; et al. (2011) Astrophys. J. 741, A90. See also Grav 2012b and Masiero 2012.
[9]	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

10955

Unit

Source

[1]

Unobserved

Value

1094

Unit

Source

[1]

Normalized RMS of residuals

Value

0.579648

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1992-10-22.597

Unit

Source

[2]

Last Observation

Value

2022-10-21.084944

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

367 (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

2015-04-10

Unit

Source

[3]

Last Observation

Value

2015-04-10

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 235756 2004VC 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	1957-10-05 04:25	< 1 min	0.0518217	0.0518204	0.0000004
EARTH	1963-10-11 20:41	< 1 min	0.1610182	0.1610166	0.0000005
EARTH	1974-04-05 03:41	< 1 min	0.0822559	0.0822550	0.0000003
EARTH	1980-04-08 15:33	< 1 s	0.1620911	0.1620898	0.0000004
EARTH	1992-10-03 10:06	< 1 s	0.1019843	0.1019832	0.0000003
EARTH	1998-10-09 13:53	< 1 s	0.0985650	0.0985641	0.0000003
EARTH	2009-04-03 04:11	< 1 s	0.1318971	0.1318967	0.0000001
EARTH	2015-04-08 05:53	< 1 s	0.1043972	0.1043972	0.0000000
EARTH	2027-10-02 12:52	< 1 s	0.1673901	0.1673892	0.0000003
EARTH	2033-10-07 10:45	< 1 min	0.0458717	0.0458709	0.0000003
EARTH	2044-04-01 22:30	< 1 min	0.1671784	0.1671770	0.0000005
EARTH	2050-04-07 13:18	< 1 min	0.0868234	0.0868224	0.0000003
EARTH	2062-10-02 10:54	< 1 min	0.1651525	0.1651499	0.0000008
EARTH	2068-10-07 19:06	< 1 min	0.0570822	0.0570800	0.0000007
EARTH	2079-04-03 22:16	< 1 min	0.1331983	0.1331961	0.0000007
EARTH	2085-04-08 10:19	< 1 min	0.1222651	0.1222632	0.0000006
EARTH	2097-10-04 05:15	< 1 min	0.0949592	0.0949575	0.0000006
EARTH	2103-10-12 05:06	< 1 min	0.1285140	0.1285127	0.0000004
EARTH	2114-04-06 17:09	< 1 s	0.0817929	0.0817924	0.0000002
EARTH	2120-04-10 11:09	< 1 s	0.1824974	0.1824966	0.0000003

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
69.82602220	271.85971639	0.03559117	MINIMUM
283.42391724	93.01297729	0.07061308	MINIMUM
356.70720117	181.81120604	0.64362366	SADDLE
176.26203830	3.54707971	0.90832434	SADDLE
357.91956609	3.89701820	1.71921909	SADDLE
188.01303091	194.91494020	2.30796564	MAXIMUM

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MOID Plots

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