| 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) |
| 2026-09-20 00:00 |
17:35:43.45 |
-32:03:00.4 |
HIP 85999 |
16.11 |
| 2026-09-20 12:00 |
17:35:46.73 |
-32:02:39.2 |
HIP 85999 |
16.89 |
| 2026-09-21 00:00 |
17:35:50.10 |
-32:02:18.1 |
HIP 85999 |
17.68 |
| 2026-09-21 12:00 |
17:35:53.58 |
-32:01:57.1 |
HIP 85999 |
18.50 |
| 2026-09-22 00:00 |
17:35:57.15 |
-32:01:36.2 |
HIP 85999 |
19.33 |
| 2026-09-22 12:00 |
17:36:00.83 |
-32:01:15.4 |
HIP 85999 |
20.18 |
| 2026-09-23 00:00 |
17:36:04.60 |
-32:00:54.7 |
HIP 86244 |
20.08 |
| 2026-09-23 12:00 |
17:36:08.48 |
-32:00:34.1 |
HIP 86244 |
19.56 |
| 2026-09-24 00:00 |
17:36:12.45 |
-32:00:13.5 |
HIP 86244 |
19.05 |
| 2026-09-24 12:00 |
17:36:16.52 |
-31:59:53.1 |
HIP 86244 |
18.55 |
| 2026-09-25 00:00 |
17:36:20.69 |
-31:59:32.8 |
HIP 86244 |
18.07 |
| 2026-09-25 12:00 |
17:36:24.96 |
-31:59:12.6 |
HIP 86244 |
17.61 |
| 2026-09-26 00:00 |
17:36:29.32 |
-31:58:52.4 |
HIP 86244 |
17.18 |
| 2026-09-26 12:00 |
17:36:33.79 |
-31:58:32.4 |
HIP 86244 |
16.78 |
| 2026-09-27 00:00 |
17:36:38.34 |
-31:58:12.5 |
HIP 86244 |
16.41 |
| 2026-09-27 12:00 |
17:36:43.00 |
-31:57:52.7 |
HIP 86244 |
16.09 |
| 2026-09-28 00:00 |
17:36:47.75 |
-31:57:33.0 |
HIP 86244 |
15.81 |
| 2026-09-28 12:00 |
17:36:52.60 |
-31:57:13.4 |
HIP 86244 |
15.60 |
| 2026-09-29 00:00 |
17:36:57.54 |
-31:56:53.9 |
HIP 86244 |
15.44 |
| 2026-09-29 12:00 |
17:37:02.58 |
-31:56:34.5 |
HIP 86244 |
15.36 |
| 2026-09-30 00:00 |
17:37:07.72 |
-31:56:15.2 |
HIP 86244 |
15.35 |
| 2026-09-30 12:00 |
17:37:12.95 |
-31:55:56.0 |
HIP 86244 |
15.41 |
| 2026-10-01 00:00 |
17:37:18.27 |
-31:55:36.9 |
HIP 86244 |
15.56 |
| 2026-10-01 12:00 |
17:37:23.69 |
-31:55:17.9 |
HIP 86244 |
15.79 |
| 2026-10-02 00:00 |
17:37:29.20 |
-31:54:59.1 |
HIP 86244 |
16.11 |
| 2026-10-02 12:00 |
17:37:34.81 |
-31:54:40.3 |
HIP 86244 |
16.51 |
| 2026-10-03 00:00 |
17:37:40.51 |
-31:54:21.7 |
HIP 86244 |
16.99 |
| 2026-10-03 12:00 |
17:37:46.30 |
-31:54:03.1 |
HIP 86244 |
17.55 |
| 2026-10-04 00:00 |
17:37:52.18 |
-31:53:44.7 |
HIP 86244 |
18.18 |
| 2026-10-04 12:00 |
17:37:58.16 |
-31:53:26.4 |
HIP 86244 |
18.88 |
| 2026-10-05 00:00 |
17:38:04.23 |
-31:53:08.2 |
HIP 86244 |
19.66 |
| 2026-10-05 12:00 |
17:38:10.39 |
-31:52:50.1 |
HIP 86244 |
20.49 |
| 2026-10-06 00:00 |
17:38:16.64 |
-31:52:32.1 |
HIP 86244 |
21.39 |
| 2026-10-06 12:00 |
17:38:22.99 |
-31:52:14.2 |
HIP 86244 |
22.34 |
| 2026-10-07 00:00 |
17:38:29.42 |
-31:51:56.5 |
HIP 86244 |
23.34 |
| 2026-10-07 12:00 |
17:38:35.95 |
-31:51:38.8 |
HIP 86244 |
24.40 |
| 2026-10-08 00:00 |
17:38:42.56 |
-31:51:21.3 |
HIP 86244 |
25.49 |
| 2026-10-08 12:00 |
17:38:49.26 |
-31:51:03.9 |
HIP 86468 |
25.93 |
| 2026-10-09 00:00 |
17:38:56.06 |
-31:50:46.5 |
HIP 86468 |
25.35 |
| 2026-10-09 12:00 |
17:39:02.94 |
-31:50:29.4 |
HIP 86468 |
24.84 |
| 2026-10-10 00:00 |
17:39:09.91 |
-31:50:12.3 |
HIP 86468 |
24.40 |
| 2026-10-10 12:00 |
17:39:16.97 |
-31:49:55.3 |
HIP 86468 |
24.03 |
| 2026-10-11 00:00 |
17:39:24.11 |
-31:49:38.4 |
HIP 86468 |
23.75 |