216P/LINEAR
| Parameter |
Value |
| Designation |
216P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-05-30T22:32:33.506880Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:15Z |
| Obs used |
403 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
21.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-04-30.0000000 |
| e |
0.44545351 |
| q (au) |
2.148896 |
| a (au) |
3.875051 |
| i (deg) |
9.046729 |
| Ω (om, deg) |
359.865529 |
| ω (w, deg) |
151.513702 |
| M (ma, deg) |
43.163177 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.693 + 5.566\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.693 |
| n |
5.566 |
| gf |
1.000 |
| gb |
-0.943 |
| k |
1.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
20:00:37.45 |
-27:39:36.7 |
HIP 98688 |
27.17 |
| 2026-02-03 12:00 |
20:01:08.18 |
-27:38:17.0 |
HIP 98688 |
20.66 |
| 2026-02-04 00:00 |
20:01:38.85 |
-27:36:57.3 |
HIP 98688 |
14.56 |
| 2026-02-04 12:00 |
20:02:09.46 |
-27:35:37.7 |
HIP 98688 |
9.63 |
| 2026-02-05 00:00 |
20:02:40.01 |
-27:34:18.1 |
HIP 98688 |
8.29 |
| 2026-02-05 12:00 |
20:03:10.51 |
-27:32:58.5 |
HIP 98688 |
11.82 |
| 2026-02-06 00:00 |
20:03:40.94 |
-27:31:39.0 |
HIP 98849 |
16.49 |
| 2026-02-06 12:00 |
20:04:11.31 |
-27:30:19.5 |
HIP 98849 |
14.86 |
| 2026-02-07 00:00 |
20:04:41.63 |
-27:29:00.1 |
HIP 98849 |
16.24 |
| 2026-02-07 12:00 |
20:05:11.88 |
-27:27:40.7 |
HIP 98849 |
20.00 |
| 2026-02-08 00:00 |
20:05:42.06 |
-27:26:21.4 |
HIP 99082 |
20.73 |
| 2026-02-08 12:00 |
20:06:12.19 |
-27:25:02.1 |
HIP 99082 |
14.99 |
| 2026-02-09 00:00 |
20:06:42.25 |
-27:23:42.9 |
HIP 99082 |
10.63 |
| 2026-02-09 12:00 |
20:07:12.24 |
-27:22:23.8 |
HIP 99082 |
9.68 |
| 2026-02-10 00:00 |
20:07:42.17 |
-27:21:04.8 |
HIP 99082 |
12.90 |
| 2026-02-10 12:00 |
20:08:12.03 |
-27:19:45.8 |
HIP 99082 |
18.18 |
| 2026-02-11 00:00 |
20:08:41.83 |
-27:18:26.9 |
HIP 99082 |
24.20 |
| 2026-02-11 12:00 |
20:09:11.56 |
-27:17:08.1 |
HIP 99313 |
26.04 |
| 2026-02-12 00:00 |
20:09:41.21 |
-27:15:49.4 |
HIP 99499 |
25.40 |
| 2026-02-12 12:00 |
20:10:10.80 |
-27:14:30.8 |
HIP 99499 |
19.24 |
| 2026-02-13 00:00 |
20:10:40.32 |
-27:13:12.3 |
HIP 99499 |
13.62 |
| 2026-02-13 12:00 |
20:11:09.77 |
-27:11:54.0 |
HIP 99499 |
9.50 |
| 2026-02-14 00:00 |
20:11:39.15 |
-27:10:35.7 |
HIP 99499 |
9.17 |
| 2026-02-14 12:00 |
20:12:08.45 |
-27:09:17.5 |
HIP 99499 |
12.89 |
| 2026-02-15 00:00 |
20:12:37.68 |
-27:07:59.5 |
HIP 99499 |
18.33 |
| 2026-02-15 12:00 |
20:13:06.84 |
-27:06:41.6 |
HIP 99499 |
24.35 |
| 2026-02-16 00:00 |
20:13:35.92 |
-27:05:23.8 |
HIP 99825 |
22.67 |
| 2026-02-16 12:00 |
20:14:04.92 |
-27:04:06.1 |
HIP 99825 |
16.10 |
| 2026-02-17 00:00 |
20:14:33.85 |
-27:02:48.7 |
HIP 99825 |
9.55 |
| 2026-02-17 12:00 |
20:15:02.71 |
-27:01:31.3 |
HIP 99825 |
3.12 |
| 2026-02-18 00:00 |
20:15:31.48 |
-27:00:14.1 |
HIP 99825 |
3.74 |
| 2026-02-18 12:00 |
20:16:00.17 |
-26:58:57.1 |
HIP 99825 |
10.16 |
| 2026-02-19 00:00 |
20:16:28.79 |
-26:57:40.2 |
HIP 99884 |
13.03 |
| 2026-02-19 12:00 |
20:16:57.32 |
-26:56:23.5 |
HIP 99884 |
16.73 |
| 2026-02-20 00:00 |
20:17:25.78 |
-26:55:06.9 |
HIP 100136 |
20.44 |
| 2026-02-20 12:00 |
20:17:54.15 |
-26:53:50.6 |
HIP 100136 |
15.94 |
| 2026-02-21 00:00 |
20:18:22.43 |
-26:52:34.4 |
HIP 100136 |
13.18 |
| 2026-02-21 12:00 |
20:18:50.64 |
-26:51:18.4 |
HIP 100136 |
13.26 |
| 2026-02-22 00:00 |
20:19:18.76 |
-26:50:02.6 |
HIP 100136 |
16.12 |
| 2026-02-22 12:00 |
20:19:46.79 |
-26:48:47.0 |
HIP 100315 |
18.74 |
| 2026-02-23 00:00 |
20:20:14.74 |
-26:47:31.6 |
HIP 100315 |
16.52 |
| 2026-02-23 12:00 |
20:20:42.60 |
-26:46:16.5 |
HIP 100315 |
16.59 |
| 2026-02-24 00:00 |
20:21:10.38 |
-26:45:01.5 |
HIP 100315 |
18.91 |