| Parameter |
Value |
| Designation |
415P/Tenagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-02-16T03:55:08.005440Z |
| Orbit solution date (soln_date, UTC) |
2025-04-09T14:05:50Z |
| Obs used |
199 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
19.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-12-25T13:33:49.824000Z |
| Discovery magnitude (MPC) |
21.10 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-11-04.0000000 |
| e |
0.19516380 |
| q (au) |
3.311953 |
| a (au) |
4.115065 |
| i (deg) |
31.789340 |
| Ω (om, deg) |
160.325572 |
| ω (w, deg) |
346.450161 |
| M (ma, deg) |
261.392377 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.504 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.504 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.732 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
00:47:34.90 |
-05:27:05.3 |
HIP 3757 |
21.24 |
| 2026-06-01 12:00 |
00:47:56.33 |
-05:26:58.4 |
HIP 3757 |
19.33 |
| 2026-06-02 00:00 |
00:48:17.66 |
-05:26:52.7 |
HIP 3757 |
18.80 |
| 2026-06-02 12:00 |
00:48:38.91 |
-05:26:48.2 |
HIP 3757 |
19.76 |
| 2026-06-03 00:00 |
00:49:00.06 |
-05:26:44.8 |
HIP 3757 |
21.98 |
| 2026-06-03 12:00 |
00:49:21.13 |
-05:26:42.5 |
HIP 3935 |
19.23 |
| 2026-06-04 00:00 |
00:49:42.10 |
-05:26:41.5 |
HIP 3935 |
14.61 |
| 2026-06-04 12:00 |
00:50:02.98 |
-05:26:41.6 |
HIP 3935 |
10.60 |
| 2026-06-05 00:00 |
00:50:23.76 |
-05:26:42.9 |
HIP 3935 |
8.11 |
| 2026-06-05 12:00 |
00:50:44.45 |
-05:26:45.4 |
HIP 3935 |
8.53 |
| 2026-06-06 00:00 |
00:51:05.05 |
-05:26:49.0 |
HIP 3935 |
11.52 |
| 2026-06-06 12:00 |
00:51:25.55 |
-05:26:53.9 |
HIP 3935 |
15.65 |
| 2026-06-07 00:00 |
00:51:45.95 |
-05:27:00.0 |
HIP 3982 |
18.02 |
| 2026-06-07 12:00 |
00:52:06.25 |
-05:27:07.3 |
HIP 4156 |
17.99 |
| 2026-06-08 00:00 |
00:52:26.46 |
-05:27:15.9 |
HIP 4156 |
14.01 |
| 2026-06-08 12:00 |
00:52:46.57 |
-05:27:25.7 |
HIP 4156 |
10.91 |
| 2026-06-09 00:00 |
00:53:06.57 |
-05:27:36.7 |
HIP 4156 |
9.58 |
| 2026-06-09 12:00 |
00:53:26.48 |
-05:27:48.9 |
HIP 4156 |
10.65 |
| 2026-06-10 00:00 |
00:53:46.28 |
-05:28:02.5 |
HIP 4156 |
13.54 |
| 2026-06-10 12:00 |
00:54:05.98 |
-05:28:17.3 |
HIP 4308 |
16.39 |
| 2026-06-11 00:00 |
00:54:25.58 |
-05:28:33.3 |
HIP 4308 |
11.63 |
| 2026-06-11 12:00 |
00:54:45.07 |
-05:28:50.6 |
HIP 4308 |
7.07 |
| 2026-06-12 00:00 |
00:55:04.45 |
-05:29:09.3 |
HIP 4308 |
3.48 |
| 2026-06-12 12:00 |
00:55:23.73 |
-05:29:29.2 |
HIP 4308 |
4.58 |
| 2026-06-13 00:00 |
00:55:42.90 |
-05:29:50.4 |
HIP 4372 |
5.10 |
| 2026-06-13 12:00 |
00:56:01.96 |
-05:30:12.9 |
HIP 4372 |
2.47 |
| 2026-06-14 00:00 |
00:56:20.91 |
-05:30:36.8 |
HIP 4372 |
5.60 |
| 2026-06-14 12:00 |
00:56:39.75 |
-05:31:01.9 |
HIP 4372 |
10.05 |
| 2026-06-15 00:00 |
00:56:58.48 |
-05:31:28.4 |
HIP 4372 |
14.64 |
| 2026-06-15 12:00 |
00:57:17.09 |
-05:31:56.2 |
HIP 4372 |
19.25 |
| 2026-06-16 00:00 |
00:57:35.59 |
-05:32:25.4 |
HIP 4372 |
23.86 |
| 2026-06-16 12:00 |
00:57:53.98 |
-05:32:55.9 |
HIP 4592 |
23.81 |
| 2026-06-17 00:00 |
00:58:12.25 |
-05:33:27.7 |
HIP 4592 |
21.20 |
| 2026-06-17 12:00 |
00:58:30.40 |
-05:34:00.9 |
HIP 4592 |
19.32 |
| 2026-06-18 00:00 |
00:58:48.44 |
-05:34:35.5 |
HIP 4592 |
18.38 |
| 2026-06-18 12:00 |
00:59:06.36 |
-05:35:11.4 |
HIP 4592 |
18.49 |
| 2026-06-19 00:00 |
00:59:24.15 |
-05:35:48.7 |
HIP 4592 |
19.63 |
| 2026-06-19 12:00 |
00:59:41.83 |
-05:36:27.4 |
HIP 4592 |
21.61 |
| 2026-06-20 00:00 |
00:59:59.39 |
-05:37:07.4 |
HIP 4592 |
24.21 |
| 2026-06-20 12:00 |
01:00:16.83 |
-05:37:48.8 |
HIP 4777 |
24.77 |
| 2026-06-21 00:00 |
01:00:34.14 |
-05:38:31.7 |
HIP 4777 |
22.76 |
| 2026-06-21 12:00 |
01:00:51.34 |
-05:39:15.9 |
HIP 4777 |
21.50 |
| 2026-06-22 00:00 |
01:01:08.40 |
-05:40:01.5 |
HIP 4777 |
21.10 |