Asteroids

2024CY1 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.694

Aphelion (Q)

1.957

Eccentricity (e)

0.476

Inclination (i)

0.7

deg

Orbit period (P)

557.6

Earth MOID

0.00082

U parameter

6.9

Next Earth close approach

Date

2033-07-23

Nominal distance (from Earth center)

0.17087

25562290

Maximum Brightness

29.2

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

29.2

mag

Diameter

4 - 9*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2024-02-09

Observatory

Pan-STARRS 2, Haleakala

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

1.325802

1-sigma variation

0.000195

Unit

Eccentricity (e)

Value

0.476195

1-sigma variation

0.000113

Unit

Inclination (i)

Value

0.7315

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

146.5738

1-sigma variation

0.0031

Unit

Arg. of Perihelion (ω)

Value

81.5797

1-sigma variation

0.0030

Unit

Mean Anomaly (M)

Value

23.61689

1-sigma variation

0.08153

Unit

Perihelion distance

Value

0.694462

1-sigma variation

Unit

Aphelion distance

Value

1.957142

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.029383

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.088068

1-sigma variation

Unit

MOID

Value

0.000822

1-sigma variation

Unit

Orbit Period

Value

557.5919

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.79342E-8	2.19135E-8	-8.15052E-8	5.97427E-7	-5.74771E-7	-1.58794E-5
e	2.19135E-8	1.26589E-8	-4.70771E-8	3.45071E-7	-3.31963E-7	-9.17311E-6
i	-8.15052E-8	-4.70771E-8	1.76653E-7	-1.29470E-6	1.24683E-6	3.41186E-5
Ω	5.97427E-7	3.45071E-7	-1.29470E-6	9.48954E-6	-9.13868E-6	-2.50086E-4
ω	-5.74771E-7	-3.31963E-7	1.24683E-6	-9.13868E-6	8.80458E-6	2.40602E-4
M	-1.58794E-5	-9.17311E-6	3.41186E-5	-2.50086E-4	2.40602E-4	6.64722E-3

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

29.181

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

4 - 9*

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 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

618

Unit

Source

[1]

Normalized RMS of residuals

Value

0.301514

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2024-02-09.337201

Unit

Source

[2]

Last Observation

Value

2024-02-12.05476

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

31 (2)

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 2024CY1 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
VENUS	1956-05-21 17:56	> 1 mo	0.0349913	0.0347476	0.0050690
VENUS	1959-07-17 23:06	> 1 mo	0.0404042	0.0000883	0.3528092
EARTH	1967-02-06 13:55	> 1 w	0.1075799	0.0008032	0.1827659
EARTH	1973-08-07 14:33	371.6	0.0068770	0.0005435	0.0042551
EARTH	1993-08-12 18:23	> 1 d	0.0798789	0.0006285	0.0314811
MARS	2002-05-01 07:03	426.9	0.0327698	0.0320930	0.0036739
EARTH	2004-02-06 02:14	> 1 d	0.1127413	0.0373019	0.0251476
EARTH	2024-02-12 07:31	< 1 s	0.0008120	0.0008114	0.0000002
EARTH	2033-07-23 04:28	> 1 d	0.1708734	0.1376058	0.0110892
EARTH	2036-08-17 14:42	1084.0	0.1522554	0.1047218	0.0158451
MARS	2041-05-06 07:19	339.9	0.0308722	0.0305422	0.0024663
VENUS	2048-09-28 04:11	> 1 d	0.0273094	0.0104821	0.0267125
VENUS	2051-10-06 02:20	> 1 d	0.0302790	0.0284704	0.0006605
EARTH	2053-02-25 16:45	> 1 d	0.1520265	0.0996252	0.0174713
VENUS	2054-10-10 17:39	> 1 d	0.0363349	0.0276246	0.0217819
EARTH	2062-08-13 11:47	> 1 d	0.0614162	0.0022941	0.0991401
EARTH	2079-02-21 12:08	> 1 d	0.1154814	0.0013662	0.0574396
EARTH	2088-08-12 04:46	1109.9	0.0434564	0.0045457	0.0131591
EARTH	2102-02-06 14:55	> 1 d	0.1336307	0.0010565	0.0809365
VENUS	2111-06-26 21:49	> 1 w	0.0114938	0.0098678	0.0216443
EARTH	2111-08-06 21:57	> 1 d	0.0676568	0.0050298	0.0450942
VENUS	2114-07-25 01:47	> 1 w	0.0132471	0.0100326	0.0748475
EARTH	2122-02-05 10:58	> 1 w	0.1686318	0.0034594	0.3631925

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
302.41279929	39.91210188	0.00078275	MINIMUM
60.33823242	215.04795461	0.00214341	MINIMUM
1.98124788	128.17069356	0.31545206	SADDLE
180.70308609	306.71294900	0.96724164	SADDLE
1.93856207	308.11967474	1.68447957	SADDLE
180.71381737	126.72676024	2.96680951	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2024CY1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2060-08-16.413	73687.413	-1.060	0.68 ± 0.000	5.15E6	9.50E-8	7.48E-3	-8.76
2073-08-16.707	78435.707	-1.060	0.86 ± 0.001	3.26E7	1.45E-8	7.52E-3	-9.70
2076-02-13.164	79346.164	-0.720	0.44 ± 0.001	5.44E5	1.40E-6	7.50E-3	-7.74
2076-08-15.561	79530.561	-1.061	0.93 ± 0.001	4.28E7	9.20E-9	7.49E-3	-9.93
2088-02-13.379	83729.379	-1.497	0.83 ± 0.006	2.83E5	1.14E-6	7.49E-3	-7.92
2091-02-11.777	84823.777	1.275	0.88 ± 0.001	7.86E6	4.13E-8	7.51E-3	-9.38
2091-02-13.049	84825.049	-1.063	1.23 ± 0.001	2.40E7	6.45E-9	7.50E-3	-10.18
2096-02-13.341	86651.341	-0.721	0.25 ± 0.001	8.87E6	8.63E-8	7.51E-3	-9.09
2096-02-13.517	86651.517	-0.724	0.98 ± 0.001	1.94E6	2.57E-7	7.51E-3	-8.61
2096-02-13.542	86651.542	3.287	0.16 ± 0.002	8.46E6	5.36E-10	7.52E-3	-11.29
2097-02-12.765	87016.765	-1.824	1.14 ± 0.001	4.07E6	2.06E-8	7.48E-3	-9.72
2102-02-13.621	88842.621	-0.700	0.91 ± 0.001	1.37E5	4.05E-6	7.51E-3	-7.45
2102-02-13.801	88842.801	3.393	0.35 ± 0.001	5.36E5	5.75E-9	7.53E-3	-10.30
2106-02-13.485	90303.485	-2.123	0.47 ± 0.001	2.99E5	3.30E-7	7.48E-3	-8.56
2109-02-12.881	91398.881	-1.239	0.05 ± 0.011	3.04E6	1.55E-7	7.48E-3	-8.91
2112-02-13.685	92494.685	-1.149	0.02 ± 0.000	4.86E7	1.08E-8	7.46E-3	-10.08
2113-02-15.424	92862.424	1.204	1.03 ± 0.001	4.26E6	1.01E-7	7.50E-3	-9.12
2117-02-12.968	94320.968	-1.076	0.32 ± 0.005	3.63E7	1.51E-8	7.48E-3	-9.97
2117-02-13.386	94321.386	1.480	0.64 ± 0.000	4.09E7	8.23E-9	7.52E-3	-10.23
2118-02-13.533	94686.533	-1.056	1.18 ± 0.000	1.13E9	4.12E-10	7.50E-3	-11.54
2120-02-13.203	95416.203	-0.978	0.90 ± 0.022	8.77E7	6.97E-9	7.49E-3	-10.32
2120-02-13.761	95416.761	-1.076	1.24 ± 0.000	5.46E8	2.75E-10	7.49E-3	-11.72
2120-02-13.833	95416.833	1.477	0.64 ± 0.001	2.01E6	1.46E-7	7.53E-3	-8.99
2120-02-15.210	95418.210	-1.832	1.10 ± 0.063	2.55E8	7.39E-10	7.47E-3	-11.30
2121-02-13.990	95782.990	-1.108	0.30 ± 0.000	4.78E7	1.15E-8	7.45E-3	-10.11
2122-02-13.811	96147.811	-0.702	0.68 ± 0.001	7.06E6	9.80E-8	7.49E-3	-9.18
2122-02-14.160	96148.160	1.189	0.84 ± 0.002	3.40E7	1.12E-8	7.48E-3	-10.12
2123-02-14.928	96513.928	-1.327	1.20 ± 0.008	1.67E7	8.14E-9	7.48E-3	-10.27


Based on 31 optical observations (of which 1 are rejected as outliers) from 2024/02/09.337 to 2024/02/12.055.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.27 and 1.27 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250805 130500.123 UTC.

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