Asteroids

2017YO3 help

Last update: 2025-06-12 11:40 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.490

Aphelion (Q)

1.015

Eccentricity (e)

0.349

Inclination (i)

8.7

deg

Orbit period (P)

238.4

Earth MOID

0.00032

U parameter

7.4

Next Earth close approach

Date

2032-12-14

Nominal distance (from Earth center)

0.06785

10149829

Maximum Brightness

26.6

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

28.1

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-12-22

Observatory

Mt. Lemmon 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

0.752515

1-sigma variation

0.000098

Unit

Eccentricity (e)

Value

0.348860

1-sigma variation

0.000203

Unit

Inclination (i)

Value

8.6501

1-sigma variation

0.0073

Unit

Long. of Ascending Node (Ω)

Value

267.9260

1-sigma variation

0.0010

Unit

Arg. of Perihelion (ω)

Value

19.5762

1-sigma variation

0.0029

Unit

Mean Anomaly (M)

Value

249.10068

1-sigma variation

0.76293

Unit

Perihelion distance

Value

0.489992

1-sigma variation

Unit

Aphelion distance

Value

1.015037

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.518380

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000509

1-sigma variation

Unit

MOID

Value

0.000325

1-sigma variation

Unit

Orbit Period

Value

238.4354

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.53558E-9	-1.98088E-8	-7.08223E-7	-9.82111E-8	2.80495E-7	-7.45004E-5
e	-1.98088E-8	4.11514E-8	1.47142E-6	2.04117E-7	-5.82364E-7	1.54763E-4
i	-7.08223E-7	1.47142E-6	5.26269E-5	7.30749E-6	-2.07944E-5	5.53315E-3
Ω	-9.82111E-8	2.04117E-7	7.30749E-6	1.01874E-6	-2.86869E-6	7.67256E-4
ω	2.80495E-7	-5.82364E-7	-2.07944E-5	-2.86869E-6	8.31915E-6	-2.19165E-3
M	-7.45004E-5	1.54763E-4	5.53315E-3	7.67256E-4	-2.19165E-3	5.82063E-1

Date of computation: 2025-06-12 11:40 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

28.116

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

6 - 14*

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

2745

Unit

Source

[1]

Normalized RMS of residuals

Value

0.784885

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-12-22.28665

Unit

Source

[2]

Last Observation

Value

2017-12-25.17181

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

25 (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

[-]

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 2017YO3 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	1956-12-15 20:39	> 1 mo	0.0419595	0.0046034	0.5698471
EARTH	1959-01-18 18:07	> 1 mo	0.0848263	0.0712973	0.2016231
MERCURY	1968-06-16 23:08	> 1 w	0.0484227	0.0428455	0.1055939
MERCURY	1973-01-12 17:06	> 1 d	0.0456086	0.0456033	0.0001949
EARTH	1973-12-18 22:15	> 1 d	0.0078044	0.0016503	0.0126012
EARTH	1976-01-16 23:58	> 1 d	0.0824953	0.0718294	0.0043538
EARTH	1978-01-30 13:56	129.4	0.1796178	0.1592280	0.0069771
EARTH	1994-12-16 01:30	1162.6	0.0504799	0.0045284	0.0194500
EARTH	1997-01-05 04:55	> 1 d	0.0621270	0.0406154	0.0087396
EARTH	1999-01-29 11:58	1154.0	0.1336348	0.1031498	0.0125853
EARTH	2015-12-15 11:07	38.1	0.1471816	0.1405057	0.0022256
EARTH	2017-12-20 14:34	< 1 min	0.0053427	0.0053317	0.0000037
EARTH	2020-01-27 12:14	175.2	0.1165294	0.1129927	0.0012011
EARTH	2032-12-14 21:51	575.9	0.0678474	0.0228831	0.0150914
EARTH	2035-01-15 05:16	> 1 d	0.0787925	0.0662483	0.0056796
MERCURY	2041-03-10 03:14	> 1 d	0.0465969	0.0429642	0.0086706
EARTH	2047-12-15 16:20	381.5	0.1729747	0.1174527	0.0185341
EARTH	2049-12-26 01:37	> 1 d	0.0324241	0.0054988	0.0113174
EARTH	2052-01-29 23:09	578.7	0.1463581	0.1188058	0.0100170
MERCURY	2061-06-03 10:08	1270.4	0.0432250	0.0432220	0.0000527
EARTH	2064-12-20 17:11	> 1 d	0.0077209	0.0000173	0.0116190
EARTH	2067-01-29 11:28	484.0	0.1531256	0.0996565	0.0387314
EARTH	2077-12-24 04:44	> 1 mo	0.0246542	0.0024005	0.2797354
EARTH	2080-01-30 02:55	> 1 d	0.1819640	0.0945515	0.2682744
MERCURY	2080-12-03 18:09	> 1 w	0.0491637	0.0356340	0.2409103
EARTH	2088-12-14 10:43	> 1 d	0.1453121	0.0103834	0.1744957
EARTH	2091-01-13 03:29	> 1 mo	0.0738128	0.0600525	0.0901710
EARTH	2101-12-17 03:49	> 1 mo	0.0406721	0.0016832	0.7436902
EARTH	2104-01-28 12:37	> 1 mo	0.1158149	0.0872341	0.4133609
MERCURY	2104-04-19 02:59	> 1 mo	0.0440142	0.0379557	0.4276396
EARTH	2114-12-21 14:58	> 1 w	0.0042823	0.0010606	0.0872693
EARTH	2123-12-16 01:07	> 1 mo	0.1382897	0.0091961	7.3924988
MERCURY	2125-01-03 03:55	> 1 mo	0.0348033	0.0339464	2.2117679

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
152.01814593	345.85578615	0.00032492	MINIMUM
1.64617894	187.66844532	0.52755461	SADDLE
0.25638578	5.61018086	1.47328247	SADDLE
179.26705687	184.48260634	2.03066073	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2017YO3

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2049-12-19.827	69794.827	-3.521	0.95 ± 0.004	1.07E3	2.21E-6	3.23E-8	-7.01
2053-12-19.783	71255.783	-4.372	1.09 ± 0.008	1.58E4	5.95E-9	8.69E-11	-9.64
2055-12-20.266	71986.266	-4.460	0.53 ± 0.010	2.58E3	2.40E-8	3.51E-10	-9.06
2056-12-19.488	72351.488	2.047	1.43 ± 0.006	1.99E5	8.30E-7	1.21E-8	-7.53
2059-12-20.270	73447.270	-4.546	0.89 ± 0.009	1.06E5	3.77E-10	5.50E-12	-10.92
2060-12-19.514	73812.514	1.919	1.63 ± 0.001	4.56E4	1.64E-6	2.39E-8	-7.29
2061-12-19.681	74177.681	-4.547	0.68 ± 0.024	2.18E6	1.97E-11	2.88E-13	-12.22
2061-12-19.717	74177.717	-4.871	1.64 ± 0.013	4.14E4	1.21E-10	1.77E-12	-11.43
2061-12-19.720	74177.720	-4.868	1.67 ± 0.010	3.93E4	6.42E-11	9.38E-13	-11.71
2096-12-19.101	86961.101	-0.967	0.36 ± 0.716	7.95E7	9.03E-9	1.32E-10	-9.84
2104-12-18.933	89881.933	-1.046	0.39 ± 0.018	5.56E5	1.38E-6	2.04E-8	-7.70


Based on 25 optical observations (of which 0 are rejected as outliers) from 2017/12/22.287 to 2017/12/25.172.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.66 and 1.68 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250305 082948.185 UTC.

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