Asteroids

2014HD198 help

Last update: 2025-03-29 00:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.750

Aphelion (Q)

3.450

Eccentricity (e)

0.643

Inclination (i)

1.0

deg

Orbit period (P)

1111.6

Earth MOID

0.00003

U parameter

9.0

Next Earth close approach

Date

2087-04-19

Nominal distance (from Earth center)

0.1996

29859735

Maximum Brightness

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

29.7

mag

Diameter

3 - 7*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2014-04-25

Observatory

Cerro Tololo-DECam

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

2.100082

1-sigma variation

0.373732

Unit

Eccentricity (e)

Value

0.642807

1-sigma variation

0.032154

Unit

Inclination (i)

Value

0.9914

1-sigma variation

2.6084

Unit

Long. of Ascending Node (Ω)

Value

219.8909

1-sigma variation

131.0190

Unit

Arg. of Perihelion (ω)

Value

69.9143

1-sigma variation

120.1080

Unit

Mean Anomaly (M)

Value

205.83849

1-sigma variation

113.23600

Unit

Perihelion distance

Value

0.750135

1-sigma variation

Unit

Aphelion distance

Value

3.450029

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000987

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.592028

1-sigma variation

Unit

MOID

Value

0.000033

1-sigma variation

Unit

Orbit Period

Value

1111.6107

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.39676E-1	1.18362E-2	-9.74781E-1	4.89652E1	-4.48830E1	4.23177E1
e	1.18362E-2	1.03390E-3	-8.24381E-2	4.14531E0	-3.79326E0	3.57961E0
i	-9.74781E-1	-8.24381E-2	6.80376E0	-3.41744E2	3.13288E2	-2.95365E2
Ω	4.89652E1	4.14531E0	-3.41744E2	1.71659E4	-1.57357E4	1.48359E4
ω	-4.48830E1	-3.79326E0	3.13288E2	-1.57357E4	1.44259E4	-1.36004E4
M	4.23177E1	3.57961E0	-2.95365E2	1.48359E4	-1.36004E4	1.28224E4

Date of computation: 2025-03-29 00:36 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

29.726

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

3 - 7*

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

1.0

Unit

Source

[1]

Unobserved

Value

4031

Unit

Source

[1]

Normalized RMS of residuals

Value

0.214706

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2014-04-25.1332

Unit

Source

[2]

Last Observation

Value

2014-04-26.0993

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

6 (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 2014HD198 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
MARS	1977-07-31 22:16	> 1 mo	0.0343451	0.0124321	22.7281300
EARTH	1980-04-24 23:28	> 1 mo	0.0714655	0.0007598	14.8801446
EARTH	1986-09-24 06:01	> 1 mo	0.0380188	0.0110212	26.6723888
VENUS	1995-11-19 16:16	> 1 mo	0.0487950	0.0000000	5.1924925
EARTH	2014-04-30 19:58	652.8	0.0046355	0.0026514	0.0006614
EARTH	2023-09-19 17:12	> 1 mo	0.0315011	0.0101221	8.1105562
EARTH	2087-04-19 15:31	> 1 mo	0.1996000	0.0015289	11.7272691
EARTH	2090-05-06 04:40	> 1 mo	0.0515929	0.0018014	8.4116020
EARTH	2099-09-18 20:16	> 1 mo	0.0573009	0.0080395	53.3845763
MARS	2099-11-03 16:19	> 1 mo	0.0132000	0.0040191	15.6078824

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
324.03928330	117.06391668	0.00003346	MINIMUM
35.69026928	257.73062938	0.01134161	MINIMUM
359.83154677	187.36787228	0.26640650	SADDLE
359.81711672	7.33095836	1.73385731	SADDLE
179.96104171	7.51346886	2.46642707	SADDLE
179.95556474	187.50978377	4.46609096	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2014HD198

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2033-04-30.484	63717.484	2.105	0.000	1.09 ± 0.371	3.68E5	1.08E-7	5.20E-10	-8.22
2077-04-27.916	79785.916	-0.925	0.000	0.17 ± 7.606	1.39E7	4.33E-9	1.85E-11	-10.46
2080-04-27.720	80881.720	-0.672	0.000	0.52 ± 1.586	4.72E6	6.69E-8	2.90E-10	-9.29
2083-04-28.746	81977.746	-0.678	0.000	0.82 ± 2.242	3.73E6	6.42E-8	2.77E-10	-9.33
2086-04-27.952	83072.952	-0.679	0.000	1.06 ± 1.685	1.38E7	2.16E-8	9.42E-11	-9.82
2086-04-27.984	83072.984	-0.919	0.000	0.60 ± 2.093	3.28E7	6.19E-9	2.67E-11	-10.36
2091-04-30.022	84901.022	-1.753	0.125	1.20 ± 5.767	4.43E5	1.59E-8	5.92E-11	-10.04
2092-04-27.623	85264.623	-0.786	0.000	0.80 ± 1.079	1.84E6	1.84E-7	8.00E-10	-8.93


Based on 6 optical observations (of which 0 are rejected as outliers) from 2014/04/25.133 to 2014/04/26.099.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.18 and 1.19 Earth radii.
Coordinates for LOV = CAR scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250305 091018.581 UTC.

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