Asteroids

2017XX61 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.798

Aphelion (Q)

3.268

Eccentricity (e)

0.607

Inclination (i)

8.4

deg

Orbit period (P)

1059.0

Earth MOID

0.01855

U parameter

8.2

Next Earth close approach

Date

2044-04-25

Nominal distance (from Earth center)

0.11071

16562484

Maximum Brightness

24.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.7

mag

Diameter

12 - 27*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-12-15

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.033285

1-sigma variation

0.003570

Unit

Eccentricity (e)

Value

0.607337

1-sigma variation

0.000749

Unit

Inclination (i)

Value

8.3908

1-sigma variation

0.0087

Unit

Long. of Ascending Node (Ω)

Value

81.4044

1-sigma variation

0.0040

Unit

Arg. of Perihelion (ω)

Value

67.7808

1-sigma variation

0.0093

Unit

Mean Anomaly (M)

Value

250.47117

1-sigma variation

2.56225

Unit

Perihelion distance

Value

0.798395

1-sigma variation

Unit

Aphelion distance

Value

3.268175

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.059244

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.648337

1-sigma variation

Unit

MOID

Value

0.018554

1-sigma variation

Unit

Orbit Period

Value

1058.9999

1-sigma variation

Unit

U parameter

Value

8.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.27452E-5	2.67376E-6	3.08477E-5	1.42157E-5	-2.01296E-5	-9.14733E-3
e	2.67376E-6	5.61459E-7	6.45386E-6	2.97426E-6	-4.04907E-6	-1.91900E-3
i	3.08477E-5	6.45386E-6	7.52576E-5	3.46715E-5	-5.43257E-5	-2.21390E-2
Ω	1.42157E-5	2.97426E-6	3.46715E-5	1.59752E-5	-2.50064E-5	-1.02024E-2
ω	-2.01296E-5	-4.04907E-6	-5.43257E-5	-2.50064E-5	8.72985E-5	1.44408E-2
M	-9.14733E-3	-1.91900E-3	-2.21390E-2	-1.02024E-2	1.44408E-2	6.56512E0

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

26.691

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

12 - 27*

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

Unit

Source

[1]

Unobserved

Value

2848

Unit

Source

[1]

Normalized RMS of residuals

Value

1.05611

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-12-15.2982

Unit

Source

[2]

Last Observation

Value

2017-12-16.43637

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

24 (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

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 2017XX61 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	1986-04-27 00:37	> 1 w	0.1091866	0.1090726	0.0037702
EARTH	1988-12-24 18:03	> 1 mo	0.0636843	0.0114161	0.3815246
EARTH	2015-04-11 07:02	> 1 w	0.1616719	0.1071471	0.0304360
EARTH	2017-12-18 14:49	< 1 min	0.0209415	0.0208729	0.0000229
EARTH	2044-04-25 19:18	> 1 w	0.1107134	0.1094060	0.0560413
EARTH	2047-01-12 17:32	> 1 mo	0.1481349	0.0020166	0.3294233
EARTH	2076-04-26 23:48	> 1 mo	0.1042249	0.1029383	0.1161881
EARTH	2079-01-03 14:30	> 1 mo	0.1113196	0.0198540	0.7322677
EARTH	2105-04-29 05:43	> 1 mo	0.0973179	0.0972032	0.0057044
EARTH	2107-12-27 22:41	> 1 mo	0.0699801	0.0235553	0.6151438

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
327.66307693	346.31194529	0.01864096	MINIMUM
35.25425861	111.85831033	0.10978044	MINIMUM
3.57244680	53.07192216	0.22712630	SADDLE
1.45858178	228.79934014	1.80543782	SADDLE
180.52449968	227.20052041	2.27058539	SADDLE
180.14082865	47.00398560	4.24998867	MAXIMUM

Download:

MOID Plots

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