| Parameter |
Value |
| Designation |
69P/Taylor |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-03-18T11:29:12.543360Z |
| Orbit solution date (soln_date, UTC) |
2024-04-16T11:21:12Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
17.300 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-06-18.0000000 |
| e |
0.41360765 |
| q (au) |
2.280445 |
| a (au) |
3.888940 |
| i (deg) |
22.041043 |
| Ω (om, deg) |
104.853333 |
| ω (w, deg) |
343.666052 |
| M (ma, deg) |
231.036957 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.538 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.538 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.771 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
05:02:12.23 |
+08:34:01.1 |
HIP 23588 |
38.61 |
| 2026-07-29 12:00 |
05:03:06.68 |
+08:36:03.5 |
HIP 23588 |
30.08 |
| 2026-07-30 00:00 |
05:04:01.10 |
+08:38:04.8 |
HIP 23666 |
25.62 |
| 2026-07-30 12:00 |
05:04:55.50 |
+08:40:04.9 |
HIP 23666 |
17.01 |
| 2026-07-31 00:00 |
05:05:49.86 |
+08:42:03.9 |
HIP 23666 |
17.08 |
| 2026-07-31 12:00 |
05:06:44.20 |
+08:44:01.9 |
HIP 23879 |
22.08 |
| 2026-08-01 00:00 |
05:07:38.50 |
+08:45:58.7 |
HIP 23879 |
16.45 |
| 2026-08-01 12:00 |
05:08:32.77 |
+08:47:54.4 |
HIP 23879 |
20.52 |
| 2026-08-02 00:00 |
05:09:27.01 |
+08:49:49.0 |
HIP 23967 |
20.09 |
| 2026-08-02 12:00 |
05:10:21.21 |
+08:51:42.5 |
HIP 23967 |
25.33 |
| 2026-08-03 00:00 |
05:11:15.38 |
+08:53:34.8 |
HIP 24247 |
20.86 |
| 2026-08-03 12:00 |
05:12:09.51 |
+08:55:26.1 |
HIP 24247 |
12.22 |
| 2026-08-04 00:00 |
05:13:03.61 |
+08:57:16.3 |
HIP 24247 |
15.09 |
| 2026-08-04 12:00 |
05:13:57.67 |
+08:59:05.4 |
HIP 24247 |
25.87 |
| 2026-08-05 00:00 |
05:14:51.69 |
+09:00:53.5 |
HIP 24522 |
16.46 |
| 2026-08-05 12:00 |
05:15:45.67 |
+09:02:40.4 |
HIP 24522 |
13.35 |
| 2026-08-06 00:00 |
05:16:39.61 |
+09:04:26.2 |
HIP 24637 |
12.50 |
| 2026-08-06 12:00 |
05:17:33.51 |
+09:06:11.0 |
HIP 24730 |
11.52 |
| 2026-08-07 00:00 |
05:18:27.37 |
+09:07:54.7 |
HIP 24730 |
6.47 |
| 2026-08-07 12:00 |
05:19:21.18 |
+09:09:37.3 |
HIP 24802 |
4.57 |
| 2026-08-08 00:00 |
05:20:14.95 |
+09:11:18.9 |
HIP 24802 |
17.94 |
| 2026-08-08 12:00 |
05:21:08.67 |
+09:12:59.4 |
HIP 25123 |
22.48 |
| 2026-08-09 00:00 |
05:22:02.34 |
+09:14:38.8 |
HIP 25123 |
9.27 |
| 2026-08-09 12:00 |
05:22:55.96 |
+09:16:17.2 |
HIP 25123 |
4.74 |
| 2026-08-10 00:00 |
05:23:49.54 |
+09:17:54.5 |
HIP 25286 |
13.21 |
| 2026-08-10 12:00 |
05:24:43.06 |
+09:19:30.8 |
HIP 25286 |
9.58 |
| 2026-08-11 00:00 |
05:25:36.53 |
+09:21:06.0 |
HIP 25375 |
7.51 |
| 2026-08-11 12:00 |
05:26:29.95 |
+09:22:40.3 |
HIP 25375 |
14.83 |
| 2026-08-12 00:00 |
05:27:23.31 |
+09:24:13.5 |
HIP 25578 |
17.14 |
| 2026-08-12 12:00 |
05:28:16.62 |
+09:25:45.6 |
HIP 25666 |
9.30 |
| 2026-08-13 00:00 |
05:29:09.86 |
+09:27:16.8 |
HIP 25666 |
3.92 |
| 2026-08-13 12:00 |
05:30:03.05 |
+09:28:47.0 |
HIP 25666 |
17.12 |
| 2026-08-14 00:00 |
05:30:56.18 |
+09:30:16.2 |
HIP 25896 |
20.04 |
| 2026-08-14 12:00 |
05:31:49.25 |
+09:31:44.3 |
HIP 25972 |
13.65 |
| 2026-08-15 00:00 |
05:32:42.26 |
+09:33:11.5 |
HIP 25972 |
7.37 |
| 2026-08-15 12:00 |
05:33:35.20 |
+09:34:37.8 |
HIP 25972 |
16.36 |
| 2026-08-16 00:00 |
05:34:28.08 |
+09:36:03.1 |
HIP 26176 |
8.47 |
| 2026-08-16 12:00 |
05:35:20.89 |
+09:37:27.4 |
HIP 26212 |
2.10 |
| 2026-08-17 00:00 |
05:36:13.64 |
+09:38:50.7 |
HIP 26294 |
7.91 |
| 2026-08-17 12:00 |
05:37:06.32 |
+09:40:13.2 |
HIP 26294 |
18.73 |
| 2026-08-18 00:00 |
05:37:58.93 |
+09:41:34.7 |
HIP 26596 |
22.48 |
| 2026-08-18 12:00 |
05:38:51.48 |
+09:42:55.3 |
HIP 26596 |
13.26 |
| 2026-08-19 00:00 |
05:39:43.95 |
+09:44:14.9 |
HIP 26627 |
7.05 |