434P/Tenagra
| Parameter |
Value |
| Designation |
434P/Tenagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-10-23T17:11:42.446400Z |
| Orbit solution date (soln_date, UTC) |
2024-02-17T03:13:57Z |
| Obs used |
188 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
18.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2021-09-30T03:48:48.960000Z |
| Discovery magnitude (MPC) |
20.00 T |
| Discovery observatory (MPC) |
Z84 · Calar Alto-Schmidt |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-10-04.0000000 |
| e |
0.27168414 |
| q (au) |
3.021756 |
| a (au) |
4.148963 |
| i (deg) |
6.319545 |
| Ω (om, deg) |
288.996686 |
| ω (w, deg) |
126.932278 |
| M (ma, deg) |
229.878650 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.973 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.973 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.688 |
| k |
0.800 |
| 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 |
16:25:53.76 |
-26:17:03.5 |
HIP 80493 |
17.06 |
| 2026-02-03 12:00 |
16:26:12.20 |
-26:17:56.6 |
HIP 80493 |
16.86 |
| 2026-02-04 00:00 |
16:26:30.51 |
-26:18:49.5 |
HIP 80493 |
17.69 |
| 2026-02-04 12:00 |
16:26:48.69 |
-26:19:42.0 |
HIP 80493 |
19.39 |
| 2026-02-05 00:00 |
16:27:06.73 |
-26:20:34.2 |
HIP 80493 |
21.75 |
| 2026-02-05 12:00 |
16:27:24.64 |
-26:21:26.1 |
HIP 80493 |
24.55 |
| 2026-02-06 00:00 |
16:27:42.41 |
-26:22:17.7 |
HIP 80763 |
23.14 |
| 2026-02-06 12:00 |
16:28:00.04 |
-26:23:09.0 |
HIP 80763 |
19.11 |
| 2026-02-07 00:00 |
16:28:17.53 |
-26:24:00.0 |
HIP 80763 |
15.11 |
| 2026-02-07 12:00 |
16:28:34.88 |
-26:24:50.5 |
HIP 80763 |
11.15 |
| 2026-02-08 00:00 |
16:28:52.09 |
-26:25:40.9 |
HIP 80763 |
7.25 |
| 2026-02-08 12:00 |
16:29:09.16 |
-26:26:30.9 |
HIP 80763 |
3.48 |
| 2026-02-09 00:00 |
16:29:26.08 |
-26:27:20.5 |
HIP 80763 |
1.47 |
| 2026-02-09 12:00 |
16:29:42.86 |
-26:28:09.9 |
HIP 80763 |
4.69 |
| 2026-02-10 00:00 |
16:29:59.49 |
-26:28:58.9 |
HIP 80763 |
8.42 |
| 2026-02-10 12:00 |
16:30:15.98 |
-26:29:47.7 |
HIP 80763 |
12.16 |
| 2026-02-11 00:00 |
16:30:32.31 |
-26:30:36.1 |
HIP 80910 |
11.43 |
| 2026-02-11 12:00 |
16:30:48.50 |
-26:31:24.2 |
HIP 80910 |
7.73 |
| 2026-02-12 00:00 |
16:31:04.54 |
-26:32:11.9 |
HIP 80910 |
4.10 |
| 2026-02-12 12:00 |
16:31:20.42 |
-26:32:59.4 |
HIP 80910 |
0.92 |
| 2026-02-13 00:00 |
16:31:36.15 |
-26:33:46.5 |
HIP 80910 |
3.34 |
| 2026-02-13 12:00 |
16:31:51.73 |
-26:34:33.3 |
HIP 80910 |
6.85 |
| 2026-02-14 00:00 |
16:32:07.15 |
-26:35:19.8 |
HIP 80910 |
10.37 |
| 2026-02-14 12:00 |
16:32:22.41 |
-26:36:06.0 |
HIP 80910 |
13.86 |
| 2026-02-15 00:00 |
16:32:37.52 |
-26:36:51.9 |
HIP 80910 |
17.32 |
| 2026-02-15 12:00 |
16:32:52.47 |
-26:37:37.4 |
HIP 81118 |
17.46 |
| 2026-02-16 00:00 |
16:33:07.25 |
-26:38:22.6 |
HIP 81118 |
14.92 |
| 2026-02-16 12:00 |
16:33:21.88 |
-26:39:07.5 |
HIP 81118 |
12.80 |
| 2026-02-17 00:00 |
16:33:36.34 |
-26:39:52.0 |
HIP 81118 |
11.31 |
| 2026-02-17 12:00 |
16:33:50.64 |
-26:40:36.3 |
HIP 81118 |
10.68 |
| 2026-02-18 00:00 |
16:34:04.78 |
-26:41:20.2 |
HIP 81118 |
11.03 |
| 2026-02-18 12:00 |
16:34:18.75 |
-26:42:03.8 |
HIP 81118 |
12.25 |
| 2026-02-19 00:00 |
16:34:32.55 |
-26:42:47.0 |
HIP 81118 |
14.08 |
| 2026-02-19 12:00 |
16:34:46.19 |
-26:43:30.0 |
HIP 81211 |
16.16 |
| 2026-02-20 00:00 |
16:34:59.66 |
-26:44:12.6 |
HIP 81211 |
15.89 |
| 2026-02-20 12:00 |
16:35:12.96 |
-26:44:54.9 |
HIP 81211 |
16.22 |
| 2026-02-21 00:00 |
16:35:26.08 |
-26:45:36.8 |
HIP 81211 |
17.09 |
| 2026-02-21 12:00 |
16:35:39.04 |
-26:46:18.5 |
HIP 81211 |
18.39 |
| 2026-02-22 00:00 |
16:35:51.82 |
-26:46:59.8 |
HIP 81211 |
20.04 |
| 2026-02-22 12:00 |
16:36:04.43 |
-26:47:40.7 |
HIP 81211 |
21.94 |
| 2026-02-23 00:00 |
16:36:16.87 |
-26:48:21.4 |
HIP 81211 |
24.00 |
| 2026-02-23 12:00 |
16:36:29.13 |
-26:49:01.7 |
HIP 81211 |
26.19 |
| 2026-02-24 00:00 |
16:36:41.21 |
-26:49:41.7 |
HIP 81456 |
24.17 |