| Parameter |
Value |
| Designation |
333P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-04-01T21:15:05.506560Z |
| Orbit solution date (soln_date, UTC) |
2025-09-22T13:42:28Z |
| Obs used |
1302 |
| NEO |
Yes |
| M1 |
14.900 |
| K1 |
7.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-03-15.0000000 |
| e |
0.73612569 |
| q (au) |
1.113680 |
| a (au) |
4.220494 |
| i (deg) |
131.973041 |
| Ω (om, deg) |
115.621541 |
| ω (w, deg) |
26.072700 |
| M (ma, deg) |
164.043825 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.962 + 4.846\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.962 |
| n |
4.846 |
| gf |
1.000 |
| gb |
-0.860 |
| k |
0.964 |
| δ90 |
10.000 |
| 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 |
| 2024-02-29 |
2025-09-18 |
+1.5741 |
-0.652 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
20:57:32.47 |
-09:39:15.6 |
HIP 103401 |
9.82 |
| 2026-05-12 12:00 |
20:57:23.88 |
-09:40:26.3 |
HIP 103401 |
7.49 |
| 2026-05-13 00:00 |
20:57:15.06 |
-09:41:38.1 |
HIP 103401 |
5.19 |
| 2026-05-13 12:00 |
20:57:06.00 |
-09:42:51.1 |
HIP 103401 |
3.12 |
| 2026-05-14 00:00 |
20:56:56.72 |
-09:44:05.2 |
HIP 103401 |
2.33 |
| 2026-05-14 12:00 |
20:56:47.19 |
-09:45:20.4 |
HIP 103401 |
3.87 |
| 2026-05-15 00:00 |
20:56:37.44 |
-09:46:36.8 |
HIP 103401 |
6.28 |
| 2026-05-15 12:00 |
20:56:27.45 |
-09:47:54.3 |
HIP 103401 |
8.92 |
| 2026-05-16 00:00 |
20:56:17.22 |
-09:49:13.0 |
HIP 103379 |
11.42 |
| 2026-05-16 12:00 |
20:56:06.76 |
-09:50:32.8 |
HIP 103379 |
13.94 |
| 2026-05-17 00:00 |
20:55:56.07 |
-09:51:53.8 |
HIP 103379 |
16.63 |
| 2026-05-17 12:00 |
20:55:45.13 |
-09:53:16.0 |
HIP 103379 |
19.46 |
| 2026-05-18 00:00 |
20:55:33.96 |
-09:54:39.3 |
HIP 103379 |
22.39 |
| 2026-05-18 12:00 |
20:55:22.56 |
-09:56:03.9 |
HIP 103379 |
25.42 |
| 2026-05-19 00:00 |
20:55:10.91 |
-09:57:29.6 |
HIP 103379 |
28.52 |
| 2026-05-19 12:00 |
20:54:59.03 |
-09:58:56.5 |
HIP 103379 |
31.71 |
| 2026-05-20 00:00 |
20:54:46.91 |
-10:00:24.6 |
HIP 103054 |
30.27 |
| 2026-05-20 12:00 |
20:54:34.55 |
-10:01:53.8 |
HIP 103054 |
27.10 |
| 2026-05-21 00:00 |
20:54:21.95 |
-10:03:24.3 |
HIP 103054 |
23.93 |
| 2026-05-21 12:00 |
20:54:09.12 |
-10:04:56.0 |
HIP 103054 |
20.79 |
| 2026-05-22 00:00 |
20:53:56.05 |
-10:06:28.8 |
HIP 103054 |
17.73 |
| 2026-05-22 12:00 |
20:53:42.74 |
-10:08:02.9 |
HIP 103054 |
14.86 |
| 2026-05-23 00:00 |
20:53:29.19 |
-10:09:38.1 |
HIP 103054 |
12.34 |
| 2026-05-23 12:00 |
20:53:15.40 |
-10:11:14.5 |
HIP 103054 |
10.52 |
| 2026-05-24 00:00 |
20:53:01.37 |
-10:12:52.2 |
HIP 103054 |
9.85 |
| 2026-05-24 12:00 |
20:52:47.11 |
-10:14:31.0 |
HIP 103054 |
10.63 |
| 2026-05-25 00:00 |
20:52:32.60 |
-10:16:11.1 |
HIP 102975 |
11.50 |
| 2026-05-25 12:00 |
20:52:17.86 |
-10:17:52.3 |
HIP 102975 |
7.61 |
| 2026-05-26 00:00 |
20:52:02.88 |
-10:19:34.8 |
HIP 102975 |
3.87 |
| 2026-05-26 12:00 |
20:51:47.67 |
-10:21:18.4 |
HIP 102975 |
2.27 |
| 2026-05-27 00:00 |
20:51:32.21 |
-10:23:03.2 |
HIP 102975 |
5.47 |
| 2026-05-27 12:00 |
20:51:16.52 |
-10:24:49.3 |
HIP 102975 |
9.53 |
| 2026-05-28 00:00 |
20:51:00.59 |
-10:26:36.5 |
HIP 102975 |
13.76 |
| 2026-05-28 12:00 |
20:50:44.42 |
-10:28:25.0 |
HIP 102975 |
18.08 |
| 2026-05-29 00:00 |
20:50:28.02 |
-10:30:14.6 |
HIP 102975 |
22.49 |
| 2026-05-29 12:00 |
20:50:11.37 |
-10:32:05.5 |
HIP 102975 |
26.96 |
| 2026-05-30 00:00 |
20:49:54.49 |
-10:33:57.5 |
HIP 102975 |
31.49 |
| 2026-05-30 12:00 |
20:49:37.38 |
-10:35:50.7 |
HIP 102975 |
36.09 |
| 2026-05-31 00:00 |
20:49:20.03 |
-10:37:45.2 |
HIP 102527 |
40.25 |
| 2026-05-31 12:00 |
20:49:02.44 |
-10:39:40.8 |
HIP 102527 |
35.74 |
| 2026-06-01 00:00 |
20:48:44.61 |
-10:41:37.6 |
HIP 102527 |
31.25 |
| 2026-06-01 12:00 |
20:48:26.55 |
-10:43:35.6 |
HIP 102527 |
26.80 |
| 2026-06-02 00:00 |
20:48:08.26 |
-10:45:34.8 |
HIP 102527 |
22.46 |