Asteroids

2004YC help

Last update: 2024-04-19 22:30 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.596

Aphelion (Q)

1.140

Eccentricity (e)

0.314

Inclination (i)

6.1

deg

Orbit period (P)

295.2

Earth MOID

0.00316

U parameter

7.0

Next Earth close approach

Date

2031-03-18

Nominal distance (from Earth center)

0.1566

23427744

Maximum Brightness

25.1

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

20 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-12-17

Observatory

Lincoln Laboratory ETS, New Mexico

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)
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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.867681

1-sigma variation

0.000048

Unit

Eccentricity (e)

Value

0.313587

1-sigma variation

0.000417

Unit

Inclination (i)

Value

6.0825

1-sigma variation

0.0115

Unit

Long. of Ascending Node (Ω)

Value

263.1437

1-sigma variation

0.0037

Unit

Arg. of Perihelion (ω)

Value

47.4544

1-sigma variation

0.0515

Unit

Mean Anomaly (M)

Value

45.04298

1-sigma variation

0.99332

Unit

Perihelion distance

Value

0.595588

1-sigma variation

Unit

Aphelion distance

Value

1.139775

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.370347

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.009572

1-sigma variation

Unit

MOID

Value

0.003162

1-sigma variation

Unit

Orbit Period

Value

295.2152

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.25991E-9	-1.97066E-8	-5.41415E-7	-1.75348E-7	-2.44494E-6	-4.72133E-5
e	-1.97066E-8	1.73853E-7	4.77879E-6	1.53555E-6	2.13998E-5	4.12503E-4
i	-5.41415E-7	4.77879E-6	1.31363E-4	4.21956E-5	5.88025E-4	1.13340E-2
Ω	-1.75348E-7	1.53555E-6	4.21956E-5	1.36266E-5	1.89962E-4	3.66590E-3
ω	-2.44494E-6	2.13998E-5	5.88025E-4	1.89962E-4	2.64828E-3	5.11106E-2
M	-4.72133E-5	4.12503E-4	1.13340E-2	3.66590E-3	5.11106E-2	9.86682E-1

Date of computation: 2024-02-21 14:29 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

25.666

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

20 - 40*

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

[-]

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Sources

No.	Name	Additional
[1]	ESA ODIM	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

7061

Unit

Source

[1]

Normalized RMS of residuals

Value

0.553907

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-12-15.13446

Unit

Source

[2]

Last Observation

Value

2004-12-19.95625

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

35 (0)

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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (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 2004YC from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1952-02-26 22:37	> 1 w	0.1545717	0.1143919	0.0348943
EARTH	1956-01-13 16:50	> 1 w	0.1571041	0.1069527	0.0177040
EARTH	1959-12-14 09:33	321.6	0.0089323	0.0043147	0.0065999
EARTH	1963-12-14 18:17	309.8	0.0996927	0.0655467	0.0113892
EARTH	1977-03-15 19:14	571.6	0.1872352	0.1529587	0.0120926
EARTH	1981-03-18 09:34	208.1	0.1147909	0.1044880	0.0052820
EARTH	1985-03-15 18:25	1226.8	0.1137183	0.1041195	0.0042990
EARTH	1989-02-22 03:42	> 1 d	0.1582412	0.1493071	0.0030919
EARTH	1993-01-31 02:12	> 1 d	0.1724070	0.1719023	0.0001909
EARTH	1997-01-10 04:55	> 1 d	0.1503705	0.1459414	0.0014843
EARTH	2000-12-20 23:56	584.7	0.0868315	0.0813696	0.0018219
EARTH	2004-12-13 11:39	< 1 min	0.0057297	0.0056989	0.0000103
EARTH	2014-03-20 11:55	39.7	0.1051633	0.1042713	0.0006335
EARTH	2018-02-02 03:21	> 1 d	0.1768511	0.1753785	0.0005337
VENUS	2021-08-19 23:11	> 1 d	0.0440197	0.0436834	0.0015941
EARTH	2021-12-15 15:43	1380.5	0.0449233	0.0078695	0.0126561
EARTH	2031-03-18 22:07	486.7	0.1566048	0.1248789	0.0119232
EARTH	2035-03-02 02:11	> 1 d	0.1526249	0.1363616	0.0060091
EARTH	2039-01-09 14:13	> 1 d	0.1505919	0.1302160	0.0068900
EARTH	2042-12-13 21:28	106.9	0.0473993	0.0059843	0.0140088
VENUS	2049-12-07 01:05	737.2	0.0438155	0.0434113	0.0006934
EARTH	2052-03-18 20:58	547.9	0.1105721	0.1044978	0.0034115
EARTH	2056-01-25 20:44	> 1 d	0.1736892	0.1670227	0.0024339
EARTH	2059-12-14 15:42	1329.5	0.0137977	0.0022974	0.0306032
EARTH	2063-12-17 04:01	> 1 d	0.1830126	0.0044675	0.1247930
EARTH	2073-03-19 14:35	> 1 d	0.1053054	0.1052476	0.0037995
VENUS	2075-10-10 13:50	> 1 mo	0.0462107	0.0448831	0.1459147
EARTH	2077-02-13 17:12	> 1 mo	0.1712191	0.1492013	0.1159140
EARTH	2081-01-05 20:42	> 1 mo	0.1427627	0.0502097	0.4520368
EARTH	2084-12-13 08:42	> 1 w	0.0140069	0.0018157	1.2302580
VENUS	2088-09-10 12:04	> 1 mo	0.0437988	0.0430828	1.0652978
EARTH	2094-03-20 02:52	> 1 mo	0.1083855	0.1054777	3.7909844
EARTH	2098-01-24 18:41	> 1 mo	0.1739260	0.1456713	3.8927409
EARTH	2101-12-14 15:33	> 1 mo	0.0066387	0.0014601	35.6329809
VENUS	2106-07-17 17:17	> 1 mo	0.0424421	0.0394442	404.8179286
EARTH	2107-03-23 18:01	> 1 mo	0.1123912	0.1059226	371.7222136
EARTH	2111-01-05 19:33	> 1 mo	0.1426776	0.0435569	1116.9367140
EARTH	2120-02-18 07:01	> 1 mo	0.1758316	0.1482860	790.2735859
EARTH	2123-12-15 06:57	> 1 mo	0.0511034	0.0014580	4636.6438817

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