| Parameter |
Value |
| Designation |
160P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-09-18T12:33:16.488000Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:13:49Z |
| Obs used |
973 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
31.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-09-19.0000000 |
| e |
0.47909715 |
| q (au) |
2.066541 |
| a (au) |
3.967229 |
| i (deg) |
17.276215 |
| Ω (om, deg) |
337.002091 |
| ω (w, deg) |
18.198295 |
| M (ma, deg) |
0.059483 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.016 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.016 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.994 |
| k |
1.000 |
| δ90 |
1.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2019-07-15 |
2019-08-02 |
+40.9969 |
-10.922 |
| 2019-08-02 |
2020-10-25 |
-18.3580 |
+8.627 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
16:00:28.36 |
-34:09:48.5 |
HIP 78507 |
14.76 |
| 2026-09-20 12:00 |
16:01:17.25 |
-34:09:14.3 |
HIP 78507 |
6.10 |
| 2026-09-21 00:00 |
16:02:06.39 |
-34:08:40.4 |
HIP 78507 |
7.88 |
| 2026-09-21 12:00 |
16:02:55.78 |
-34:08:06.8 |
HIP 78507 |
17.20 |
| 2026-09-22 00:00 |
16:03:45.42 |
-34:07:33.5 |
HIP 78826 |
22.58 |
| 2026-09-22 12:00 |
16:04:35.32 |
-34:07:00.4 |
HIP 78826 |
12.93 |
| 2026-09-23 00:00 |
16:05:25.46 |
-34:06:27.5 |
HIP 78826 |
6.23 |
| 2026-09-23 12:00 |
16:06:15.85 |
-34:05:54.8 |
HIP 78826 |
11.30 |
| 2026-09-24 00:00 |
16:07:06.49 |
-34:05:22.2 |
HIP 78826 |
20.91 |
| 2026-09-24 12:00 |
16:07:57.37 |
-34:04:49.9 |
HIP 78973 |
23.80 |
| 2026-09-25 00:00 |
16:08:48.50 |
-34:04:17.7 |
HIP 79065 |
27.14 |
| 2026-09-25 12:00 |
16:09:39.87 |
-34:03:45.5 |
HIP 79199 |
31.13 |
| 2026-09-26 00:00 |
16:10:31.48 |
-34:03:13.5 |
HIP 79199 |
31.54 |
| 2026-09-26 12:00 |
16:11:23.34 |
-34:02:41.6 |
HIP 79459 |
22.38 |
| 2026-09-27 00:00 |
16:12:15.43 |
-34:02:09.7 |
HIP 79459 |
13.97 |
| 2026-09-27 12:00 |
16:13:07.76 |
-34:01:37.9 |
HIP 79459 |
11.13 |
| 2026-09-28 00:00 |
16:14:00.34 |
-34:01:06.1 |
HIP 79459 |
17.03 |
| 2026-09-28 12:00 |
16:14:53.15 |
-34:00:34.3 |
HIP 79459 |
26.41 |
| 2026-09-29 00:00 |
16:15:46.19 |
-34:00:02.5 |
HIP 79793 |
29.50 |
| 2026-09-29 12:00 |
16:16:39.47 |
-33:59:30.6 |
HIP 79896 |
22.52 |
| 2026-09-30 00:00 |
16:17:32.99 |
-33:58:58.7 |
HIP 79896 |
11.52 |
| 2026-09-30 12:00 |
16:18:26.74 |
-33:58:26.7 |
HIP 79896 |
2.14 |
| 2026-10-01 00:00 |
16:19:20.72 |
-33:57:54.6 |
HIP 79896 |
11.24 |
| 2026-10-01 12:00 |
16:20:14.94 |
-33:57:22.4 |
HIP 79896 |
22.39 |
| 2026-10-02 00:00 |
16:21:09.39 |
-33:56:50.1 |
HIP 80220 |
23.99 |
| 2026-10-02 12:00 |
16:22:04.07 |
-33:56:17.7 |
HIP 80220 |
16.96 |
| 2026-10-03 00:00 |
16:22:58.97 |
-33:55:45.0 |
HIP 80220 |
16.09 |
| 2026-10-03 12:00 |
16:23:54.11 |
-33:55:12.2 |
HIP 80220 |
22.19 |
| 2026-10-04 00:00 |
16:24:49.48 |
-33:54:39.2 |
HIP 80486 |
23.66 |
| 2026-10-04 12:00 |
16:25:45.07 |
-33:54:05.9 |
HIP 80486 |
20.07 |
| 2026-10-05 00:00 |
16:26:40.90 |
-33:53:32.4 |
HIP 80486 |
22.70 |
| 2026-10-05 12:00 |
16:27:36.95 |
-33:52:58.6 |
HIP 80486 |
29.99 |
| 2026-10-06 00:00 |
16:28:33.22 |
-33:52:24.6 |
HIP 80813 |
24.78 |
| 2026-10-06 12:00 |
16:29:29.72 |
-33:51:50.2 |
HIP 80813 |
17.45 |
| 2026-10-07 00:00 |
16:30:26.44 |
-33:51:15.6 |
HIP 80813 |
16.44 |
| 2026-10-07 12:00 |
16:31:23.38 |
-33:50:40.6 |
HIP 80813 |
22.69 |
| 2026-10-08 00:00 |
16:32:20.54 |
-33:50:05.2 |
HIP 80987 |
24.21 |
| 2026-10-08 12:00 |
16:33:17.93 |
-33:49:29.5 |
HIP 81194 |
24.50 |
| 2026-10-09 00:00 |
16:34:15.53 |
-33:48:53.3 |
HIP 81194 |
14.18 |
| 2026-10-09 12:00 |
16:35:13.35 |
-33:48:16.8 |
HIP 81194 |
9.45 |
| 2026-10-10 00:00 |
16:36:11.39 |
-33:47:39.8 |
HIP 81194 |
16.39 |
| 2026-10-10 12:00 |
16:37:09.64 |
-33:47:02.4 |
HIP 81447 |
18.28 |
| 2026-10-11 00:00 |
16:38:08.11 |
-33:46:24.5 |
HIP 81447 |
14.78 |