| Parameter |
Value |
| Designation |
P/2015 TP200 (LINEAR) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-10-28T04:52:00.001920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:16Z |
| Obs used |
693 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
15.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-11-16.0000000 |
| e |
0.53612967 |
| q (au) |
3.385307 |
| a (au) |
7.297961 |
| i (deg) |
8.772293 |
| Ω (om, deg) |
6.975445 |
| ω (w, deg) |
82.735610 |
| M (ma, deg) |
0.939714 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.546 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.546 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.957 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
18:04:45.87 |
-32:45:15.4 |
HIP 88677 |
18.71 |
| 2026-05-12 12:00 |
18:04:38.44 |
-32:45:34.6 |
HIP 88677 |
20.29 |
| 2026-05-13 00:00 |
18:04:30.93 |
-32:45:53.5 |
HIP 88677 |
21.90 |
| 2026-05-13 12:00 |
18:04:23.34 |
-32:46:12.3 |
HIP 88677 |
23.52 |
| 2026-05-14 00:00 |
18:04:15.67 |
-32:46:30.9 |
HIP 88677 |
25.16 |
| 2026-05-14 12:00 |
18:04:07.92 |
-32:46:49.3 |
HIP 88677 |
26.81 |
| 2026-05-15 00:00 |
18:04:00.09 |
-32:47:07.5 |
HIP 88677 |
28.48 |
| 2026-05-15 12:00 |
18:03:52.18 |
-32:47:25.5 |
HIP 88287 |
27.50 |
| 2026-05-16 00:00 |
18:03:44.20 |
-32:47:43.3 |
HIP 88287 |
25.90 |
| 2026-05-16 12:00 |
18:03:36.14 |
-32:48:00.9 |
HIP 88287 |
24.30 |
| 2026-05-17 00:00 |
18:03:28.00 |
-32:48:18.3 |
HIP 88287 |
22.69 |
| 2026-05-17 12:00 |
18:03:19.79 |
-32:48:35.5 |
HIP 88287 |
21.09 |
| 2026-05-18 00:00 |
18:03:11.50 |
-32:48:52.5 |
HIP 88287 |
19.51 |
| 2026-05-18 12:00 |
18:03:03.15 |
-32:49:09.3 |
HIP 88287 |
17.94 |
| 2026-05-19 00:00 |
18:02:54.72 |
-32:49:25.8 |
HIP 88287 |
16.39 |
| 2026-05-19 12:00 |
18:02:46.22 |
-32:49:42.2 |
HIP 88287 |
14.89 |
| 2026-05-20 00:00 |
18:02:37.65 |
-32:49:58.3 |
HIP 88287 |
13.45 |
| 2026-05-20 12:00 |
18:02:29.01 |
-32:50:14.2 |
HIP 88287 |
12.10 |
| 2026-05-21 00:00 |
18:02:20.30 |
-32:50:29.9 |
HIP 88287 |
10.88 |
| 2026-05-21 12:00 |
18:02:11.53 |
-32:50:45.4 |
HIP 88287 |
9.85 |
| 2026-05-22 00:00 |
18:02:02.69 |
-32:51:00.6 |
HIP 88287 |
9.07 |
| 2026-05-22 12:00 |
18:01:53.79 |
-32:51:15.6 |
HIP 88287 |
8.64 |
| 2026-05-23 00:00 |
18:01:44.82 |
-32:51:30.4 |
HIP 88287 |
8.60 |
| 2026-05-23 12:00 |
18:01:35.79 |
-32:51:45.0 |
HIP 88287 |
8.96 |
| 2026-05-24 00:00 |
18:01:26.70 |
-32:51:59.3 |
HIP 88287 |
9.70 |
| 2026-05-24 12:00 |
18:01:17.55 |
-32:52:13.3 |
HIP 88287 |
10.75 |
| 2026-05-25 00:00 |
18:01:08.33 |
-32:52:27.1 |
HIP 88238 |
10.80 |
| 2026-05-25 12:00 |
18:00:59.06 |
-32:52:40.7 |
HIP 88238 |
10.70 |
| 2026-05-26 00:00 |
18:00:49.73 |
-32:52:54.1 |
HIP 88238 |
10.96 |
| 2026-05-26 12:00 |
18:00:40.35 |
-32:53:07.1 |
HIP 88238 |
11.57 |
| 2026-05-27 00:00 |
18:00:30.91 |
-32:53:20.0 |
HIP 88238 |
12.47 |
| 2026-05-27 12:00 |
18:00:21.41 |
-32:53:32.5 |
HIP 88238 |
13.62 |
| 2026-05-28 00:00 |
18:00:11.86 |
-32:53:44.9 |
HIP 88238 |
14.96 |
| 2026-05-28 12:00 |
18:00:02.26 |
-32:53:56.9 |
HIP 88238 |
16.45 |
| 2026-05-29 00:00 |
17:59:52.61 |
-32:54:08.8 |
HIP 88238 |
18.05 |
| 2026-05-29 12:00 |
17:59:42.90 |
-32:54:20.3 |
HIP 87985 |
16.89 |
| 2026-05-30 00:00 |
17:59:33.15 |
-32:54:31.6 |
HIP 87985 |
14.84 |
| 2026-05-30 12:00 |
17:59:23.34 |
-32:54:42.6 |
HIP 87985 |
12.78 |
| 2026-05-31 00:00 |
17:59:13.49 |
-32:54:53.4 |
HIP 87985 |
10.72 |
| 2026-05-31 12:00 |
17:59:03.60 |
-32:55:03.9 |
HIP 87985 |
8.65 |
| 2026-06-01 00:00 |
17:58:53.65 |
-32:55:14.1 |
HIP 87985 |
6.58 |
| 2026-06-01 12:00 |
17:58:43.66 |
-32:55:24.1 |
HIP 87985 |
4.53 |
| 2026-06-02 00:00 |
17:58:33.63 |
-32:55:33.8 |
HIP 87985 |
2.55 |