P/2015 TP200 (LINEAR)
| 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) |
| 2026-02-03 00:00 |
17:57:22.82 |
-31:33:17.6 |
HIP 87839 |
8.74 |
| 2026-02-03 12:00 |
17:57:33.75 |
-31:33:33.8 |
HIP 87966 |
7.37 |
| 2026-02-04 00:00 |
17:57:44.62 |
-31:33:50.1 |
HIP 87966 |
5.16 |
| 2026-02-04 12:00 |
17:57:55.43 |
-31:34:06.6 |
HIP 87966 |
3.16 |
| 2026-02-05 00:00 |
17:58:06.17 |
-31:34:23.1 |
HIP 87966 |
2.02 |
| 2026-02-05 12:00 |
17:58:16.86 |
-31:34:39.6 |
HIP 87966 |
2.96 |
| 2026-02-06 00:00 |
17:58:27.48 |
-31:34:56.3 |
HIP 87966 |
4.89 |
| 2026-02-06 12:00 |
17:58:38.03 |
-31:35:13.1 |
HIP 87966 |
7.02 |
| 2026-02-07 00:00 |
17:58:48.53 |
-31:35:29.9 |
HIP 87966 |
9.20 |
| 2026-02-07 12:00 |
17:58:58.95 |
-31:35:46.9 |
HIP 88072 |
9.90 |
| 2026-02-08 00:00 |
17:59:09.31 |
-31:36:03.9 |
HIP 88072 |
9.63 |
| 2026-02-08 12:00 |
17:59:19.61 |
-31:36:21.0 |
HIP 88072 |
9.86 |
| 2026-02-09 00:00 |
17:59:29.84 |
-31:36:38.2 |
HIP 88072 |
10.56 |
| 2026-02-09 12:00 |
17:59:40.00 |
-31:36:55.5 |
HIP 88072 |
11.63 |
| 2026-02-10 00:00 |
17:59:50.09 |
-31:37:12.9 |
HIP 88072 |
12.98 |
| 2026-02-10 12:00 |
18:00:00.11 |
-31:37:30.4 |
HIP 88072 |
14.52 |
| 2026-02-11 00:00 |
18:00:10.06 |
-31:37:48.0 |
HIP 88072 |
16.19 |
| 2026-02-11 12:00 |
18:00:19.95 |
-31:38:05.6 |
HIP 88259 |
15.08 |
| 2026-02-12 00:00 |
18:00:29.76 |
-31:38:23.4 |
HIP 88259 |
13.10 |
| 2026-02-12 12:00 |
18:00:39.50 |
-31:38:41.2 |
HIP 88259 |
11.18 |
| 2026-02-13 00:00 |
18:00:49.17 |
-31:38:59.1 |
HIP 88259 |
9.35 |
| 2026-02-13 12:00 |
18:00:58.77 |
-31:39:17.1 |
HIP 88259 |
7.65 |
| 2026-02-14 00:00 |
18:01:08.29 |
-31:39:35.2 |
HIP 88259 |
6.19 |
| 2026-02-14 12:00 |
18:01:17.74 |
-31:39:53.4 |
HIP 88259 |
5.14 |
| 2026-02-15 00:00 |
18:01:27.12 |
-31:40:11.7 |
HIP 88259 |
4.78 |
| 2026-02-15 12:00 |
18:01:36.42 |
-31:40:30.1 |
HIP 88259 |
5.22 |
| 2026-02-16 00:00 |
18:01:45.65 |
-31:40:48.6 |
HIP 88259 |
6.29 |
| 2026-02-16 12:00 |
18:01:54.80 |
-31:41:07.1 |
HIP 88259 |
7.71 |
| 2026-02-17 00:00 |
18:02:03.87 |
-31:41:25.8 |
HIP 88259 |
9.32 |
| 2026-02-17 12:00 |
18:02:12.86 |
-31:41:44.5 |
HIP 88259 |
11.02 |
| 2026-02-18 00:00 |
18:02:21.78 |
-31:42:03.3 |
HIP 88336 |
12.69 |
| 2026-02-18 12:00 |
18:02:30.62 |
-31:42:22.2 |
HIP 88336 |
13.04 |
| 2026-02-19 00:00 |
18:02:39.38 |
-31:42:41.3 |
HIP 88336 |
13.64 |
| 2026-02-19 12:00 |
18:02:48.06 |
-31:43:00.4 |
HIP 88336 |
14.47 |
| 2026-02-20 00:00 |
18:02:56.66 |
-31:43:19.6 |
HIP 88336 |
15.47 |
| 2026-02-20 12:00 |
18:03:05.18 |
-31:43:38.8 |
HIP 88336 |
16.62 |
| 2026-02-21 00:00 |
18:03:13.62 |
-31:43:58.2 |
HIP 88336 |
17.87 |
| 2026-02-21 12:00 |
18:03:21.98 |
-31:44:17.7 |
HIP 88336 |
19.20 |
| 2026-02-22 00:00 |
18:03:30.26 |
-31:44:37.2 |
HIP 88336 |
20.60 |
| 2026-02-22 12:00 |
18:03:38.45 |
-31:44:56.9 |
HIP 88336 |
22.04 |
| 2026-02-23 00:00 |
18:03:46.56 |
-31:45:16.6 |
HIP 88336 |
23.51 |
| 2026-02-23 12:00 |
18:03:54.58 |
-31:45:36.4 |
HIP 88336 |
25.01 |
| 2026-02-24 00:00 |
18:04:02.53 |
-31:45:56.3 |
HIP 88649 |
25.89 |