| 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) |
| 2026-05-12 00:00 |
16:27:54.22 |
-27:07:01.0 |
HIP 80586 |
10.24 |
| 2026-05-12 12:00 |
16:27:36.96 |
-27:06:23.7 |
HIP 80586 |
7.36 |
| 2026-05-13 00:00 |
16:27:19.61 |
-27:05:45.7 |
HIP 80565 |
5.62 |
| 2026-05-13 12:00 |
16:27:02.16 |
-27:05:07.1 |
HIP 80565 |
3.40 |
| 2026-05-14 00:00 |
16:26:44.62 |
-27:04:27.8 |
HIP 80565 |
4.76 |
| 2026-05-14 12:00 |
16:26:26.99 |
-27:03:47.9 |
HIP 80565 |
8.09 |
| 2026-05-15 00:00 |
16:26:09.28 |
-27:03:07.4 |
HIP 80565 |
11.85 |
| 2026-05-15 12:00 |
16:25:51.49 |
-27:02:26.2 |
HIP 80565 |
15.75 |
| 2026-05-16 00:00 |
16:25:33.62 |
-27:01:44.3 |
HIP 80387 |
15.86 |
| 2026-05-16 12:00 |
16:25:15.68 |
-27:01:01.9 |
HIP 80387 |
12.88 |
| 2026-05-17 00:00 |
16:24:57.66 |
-27:00:18.8 |
HIP 80387 |
10.64 |
| 2026-05-17 12:00 |
16:24:39.58 |
-26:59:35.1 |
HIP 80387 |
9.70 |
| 2026-05-18 00:00 |
16:24:21.43 |
-26:58:50.7 |
HIP 80387 |
10.41 |
| 2026-05-18 12:00 |
16:24:03.21 |
-26:58:05.8 |
HIP 80387 |
12.53 |
| 2026-05-19 00:00 |
16:23:44.94 |
-26:57:20.3 |
HIP 80400 |
15.25 |
| 2026-05-19 12:00 |
16:23:26.62 |
-26:56:34.1 |
HIP 80400 |
18.37 |
| 2026-05-20 00:00 |
16:23:08.24 |
-26:55:47.3 |
HIP 80400 |
21.85 |
| 2026-05-20 12:00 |
16:22:49.81 |
-26:55:00.0 |
HIP 80400 |
25.54 |
| 2026-05-21 00:00 |
16:22:31.34 |
-26:54:12.1 |
HIP 80123 |
25.52 |
| 2026-05-21 12:00 |
16:22:12.83 |
-26:53:23.6 |
HIP 80123 |
23.81 |
| 2026-05-22 00:00 |
16:21:54.27 |
-26:52:34.5 |
HIP 80123 |
22.76 |
| 2026-05-22 12:00 |
16:21:35.68 |
-26:51:44.8 |
HIP 80123 |
22.48 |
| 2026-05-23 00:00 |
16:21:17.06 |
-26:50:54.6 |
HIP 79987 |
22.18 |
| 2026-05-23 12:00 |
16:20:58.41 |
-26:50:03.8 |
HIP 79987 |
18.13 |
| 2026-05-24 00:00 |
16:20:39.73 |
-26:49:12.5 |
HIP 79987 |
14.19 |
| 2026-05-24 12:00 |
16:20:21.03 |
-26:48:20.6 |
HIP 79987 |
10.50 |
| 2026-05-25 00:00 |
16:20:02.31 |
-26:47:28.2 |
HIP 79987 |
7.43 |
| 2026-05-25 12:00 |
16:19:43.58 |
-26:46:35.3 |
HIP 79987 |
6.06 |
| 2026-05-26 00:00 |
16:19:24.83 |
-26:45:41.8 |
HIP 79987 |
7.41 |
| 2026-05-26 12:00 |
16:19:06.07 |
-26:44:47.9 |
HIP 79987 |
10.48 |
| 2026-05-27 00:00 |
16:18:47.30 |
-26:43:53.4 |
HIP 79987 |
14.20 |
| 2026-05-27 12:00 |
16:18:28.53 |
-26:42:58.4 |
HIP 79987 |
18.18 |
| 2026-05-28 00:00 |
16:18:09.75 |
-26:42:02.9 |
HIP 79987 |
22.27 |
| 2026-05-28 12:00 |
16:17:50.98 |
-26:41:06.9 |
HIP 79815 |
21.61 |
| 2026-05-29 00:00 |
16:17:32.22 |
-26:40:10.5 |
HIP 79815 |
19.77 |
| 2026-05-29 12:00 |
16:17:13.46 |
-26:39:13.5 |
HIP 79815 |
18.75 |
| 2026-05-30 00:00 |
16:16:54.71 |
-26:38:16.1 |
HIP 79815 |
18.68 |
| 2026-05-30 12:00 |
16:16:35.98 |
-26:37:18.3 |
HIP 79815 |
19.57 |
| 2026-05-31 00:00 |
16:16:17.26 |
-26:36:20.0 |
HIP 79815 |
21.30 |
| 2026-05-31 12:00 |
16:15:58.57 |
-26:35:21.3 |
HIP 79815 |
23.69 |
| 2026-06-01 00:00 |
16:15:39.89 |
-26:34:22.1 |
HIP 79815 |
26.56 |
| 2026-06-01 12:00 |
16:15:21.25 |
-26:33:22.5 |
HIP 79546 |
25.18 |
| 2026-06-02 00:00 |
16:15:02.63 |
-26:32:22.5 |
HIP 79546 |
21.40 |