| 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) |
| 2026-03-26 00:00 |
20:55:53.80 |
-08:55:11.1 |
HIP 103223 |
16.81 |
| 2026-03-26 12:00 |
20:56:02.85 |
-08:55:09.3 |
HIP 103223 |
19.03 |
| 2026-03-27 00:00 |
20:56:11.76 |
-08:55:07.8 |
HIP 103223 |
21.21 |
| 2026-03-27 12:00 |
20:56:20.53 |
-08:55:06.8 |
HIP 103223 |
23.37 |
| 2026-03-28 00:00 |
20:56:29.16 |
-08:55:06.2 |
HIP 103223 |
25.49 |
| 2026-03-28 12:00 |
20:56:37.64 |
-08:55:06.0 |
HIP 103223 |
27.58 |
| 2026-03-29 00:00 |
20:56:45.98 |
-08:55:06.2 |
HIP 103223 |
29.63 |
| 2026-03-29 12:00 |
20:56:54.18 |
-08:55:06.9 |
HIP 103223 |
31.65 |
| 2026-03-30 00:00 |
20:57:02.22 |
-08:55:08.0 |
HIP 103223 |
33.63 |
| 2026-03-30 12:00 |
20:57:10.12 |
-08:55:09.5 |
HIP 103591 |
32.47 |
| 2026-03-31 00:00 |
20:57:17.87 |
-08:55:11.5 |
HIP 103591 |
30.57 |
| 2026-03-31 12:00 |
20:57:25.47 |
-08:55:13.9 |
HIP 103591 |
28.70 |
| 2026-04-01 00:00 |
20:57:32.92 |
-08:55:16.8 |
HIP 103591 |
26.87 |
| 2026-04-01 12:00 |
20:57:40.22 |
-08:55:20.2 |
HIP 103591 |
25.09 |
| 2026-04-02 00:00 |
20:57:47.37 |
-08:55:24.1 |
HIP 103591 |
23.34 |
| 2026-04-02 12:00 |
20:57:54.36 |
-08:55:28.4 |
HIP 103591 |
21.63 |
| 2026-04-03 00:00 |
20:58:01.20 |
-08:55:33.3 |
HIP 103591 |
19.97 |
| 2026-04-03 12:00 |
20:58:07.88 |
-08:55:38.7 |
HIP 103591 |
18.35 |
| 2026-04-04 00:00 |
20:58:14.41 |
-08:55:44.5 |
HIP 103591 |
16.78 |
| 2026-04-04 12:00 |
20:58:20.78 |
-08:55:51.0 |
HIP 103591 |
15.26 |
| 2026-04-05 00:00 |
20:58:26.99 |
-08:55:57.9 |
HIP 103591 |
13.79 |
| 2026-04-05 12:00 |
20:58:33.04 |
-08:56:05.4 |
HIP 103591 |
12.37 |
| 2026-04-06 00:00 |
20:58:38.93 |
-08:56:13.4 |
HIP 103591 |
11.02 |
| 2026-04-06 12:00 |
20:58:44.66 |
-08:56:22.0 |
HIP 103591 |
9.74 |
| 2026-04-07 00:00 |
20:58:50.23 |
-08:56:31.2 |
HIP 103591 |
8.55 |
| 2026-04-07 12:00 |
20:58:55.63 |
-08:56:40.9 |
HIP 103591 |
7.47 |
| 2026-04-08 00:00 |
20:59:00.87 |
-08:56:51.2 |
HIP 103591 |
6.52 |
| 2026-04-08 12:00 |
20:59:05.95 |
-08:57:02.1 |
HIP 103591 |
5.74 |
| 2026-04-09 00:00 |
20:59:10.85 |
-08:57:13.6 |
HIP 103591 |
5.20 |
| 2026-04-09 12:00 |
20:59:15.59 |
-08:57:25.8 |
HIP 103591 |
4.92 |
| 2026-04-10 00:00 |
20:59:20.16 |
-08:57:38.5 |
HIP 103591 |
4.94 |
| 2026-04-10 12:00 |
20:59:24.56 |
-08:57:51.9 |
HIP 103591 |
5.22 |
| 2026-04-11 00:00 |
20:59:28.78 |
-08:58:05.9 |
HIP 103591 |
5.71 |
| 2026-04-11 12:00 |
20:59:32.84 |
-08:58:20.6 |
HIP 103591 |
6.32 |
| 2026-04-12 00:00 |
20:59:36.72 |
-08:58:35.9 |
HIP 103591 |
7.03 |
| 2026-04-12 12:00 |
20:59:40.42 |
-08:58:51.8 |
HIP 103591 |
7.77 |
| 2026-04-13 00:00 |
20:59:43.95 |
-08:59:08.5 |
HIP 103591 |
8.54 |
| 2026-04-13 12:00 |
20:59:47.30 |
-08:59:25.8 |
HIP 103591 |
9.31 |
| 2026-04-14 00:00 |
20:59:50.48 |
-08:59:43.9 |
HIP 103591 |
10.08 |
| 2026-04-14 12:00 |
20:59:53.47 |
-09:00:02.6 |
HIP 103591 |
10.83 |
| 2026-04-15 00:00 |
20:59:56.28 |
-09:00:22.0 |
HIP 103591 |
11.56 |
| 2026-04-15 12:00 |
20:59:58.91 |
-09:00:42.2 |
HIP 103591 |
12.27 |
| 2026-04-16 00:00 |
21:00:01.36 |
-09:01:03.1 |
HIP 103591 |
12.96 |