| Parameter |
Value |
| Designation |
C/1996 Q1 (Tabur) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1996-11-03T12:46:28.758720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:49Z |
| Obs used |
214 |
| NEO |
- |
| M1 |
11.000 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1996-09-15.0000000 |
| e |
0.99861194 |
| q (au) |
0.839803 |
| a (au) |
605.019223 |
| i (deg) |
73.355632 |
| Ω (om, deg) |
31.399626 |
| ω (w, deg) |
57.412892 |
| M (ma, deg) |
359.996720 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.550 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.550 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 1996-08-21 |
1996-09-14 |
+20.1110 |
-2.149 |
| 1996-09-14 |
1996-10-11 |
-2.1380 |
-0.247 |
| 1996-10-11 |
1996-11-03 |
-32.9959 |
-1.069 |
| 1996-11-03 |
1997-10-05 |
-3.4416 |
+1.689 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
13:34:41.50 |
-55:22:07.8 |
HIP 66366 |
14.57 |
| 2026-06-01 12:00 |
13:34:38.86 |
-55:21:45.6 |
HIP 66366 |
14.75 |
| 2026-06-02 00:00 |
13:34:36.24 |
-55:21:23.3 |
HIP 66366 |
14.94 |
| 2026-06-02 12:00 |
13:34:33.65 |
-55:21:00.9 |
HIP 66366 |
15.13 |
| 2026-06-03 00:00 |
13:34:31.08 |
-55:20:38.4 |
HIP 66366 |
15.35 |
| 2026-06-03 12:00 |
13:34:28.54 |
-55:20:15.9 |
HIP 66366 |
15.57 |
| 2026-06-04 00:00 |
13:34:26.01 |
-55:19:53.2 |
HIP 66366 |
15.80 |
| 2026-06-04 12:00 |
13:34:23.51 |
-55:19:30.5 |
HIP 66366 |
16.04 |
| 2026-06-05 00:00 |
13:34:21.04 |
-55:19:07.6 |
HIP 66366 |
16.30 |
| 2026-06-05 12:00 |
13:34:18.59 |
-55:18:44.7 |
HIP 66366 |
16.56 |
| 2026-06-06 00:00 |
13:34:16.17 |
-55:18:21.8 |
HIP 66366 |
16.83 |
| 2026-06-06 12:00 |
13:34:13.77 |
-55:17:58.7 |
HIP 66366 |
17.10 |
| 2026-06-07 00:00 |
13:34:11.39 |
-55:17:35.6 |
HIP 66366 |
17.39 |
| 2026-06-07 12:00 |
13:34:09.04 |
-55:17:12.4 |
HIP 66366 |
17.68 |
| 2026-06-08 00:00 |
13:34:06.72 |
-55:16:49.1 |
HIP 66366 |
17.98 |
| 2026-06-08 12:00 |
13:34:04.42 |
-55:16:25.8 |
HIP 66366 |
18.28 |
| 2026-06-09 00:00 |
13:34:02.14 |
-55:16:02.3 |
HIP 66366 |
18.59 |
| 2026-06-09 12:00 |
13:33:59.90 |
-55:15:38.9 |
HIP 66366 |
18.90 |
| 2026-06-10 00:00 |
13:33:57.67 |
-55:15:15.3 |
HIP 66366 |
19.22 |
| 2026-06-10 12:00 |
13:33:55.48 |
-55:14:51.7 |
HIP 66366 |
19.54 |
| 2026-06-11 00:00 |
13:33:53.31 |
-55:14:28.1 |
HIP 66366 |
19.87 |
| 2026-06-11 12:00 |
13:33:51.17 |
-55:14:04.4 |
HIP 66366 |
20.20 |
| 2026-06-12 00:00 |
13:33:49.05 |
-55:13:40.6 |
HIP 66366 |
20.53 |
| 2026-06-12 12:00 |
13:33:46.96 |
-55:13:16.7 |
HIP 66366 |
20.87 |
| 2026-06-13 00:00 |
13:33:44.90 |
-55:12:52.9 |
HIP 66366 |
21.21 |
| 2026-06-13 12:00 |
13:33:42.86 |
-55:12:28.9 |
HIP 66366 |
21.55 |
| 2026-06-14 00:00 |
13:33:40.85 |
-55:12:05.0 |
HIP 66366 |
21.89 |
| 2026-06-14 12:00 |
13:33:38.87 |
-55:11:40.9 |
HIP 66366 |
22.24 |
| 2026-06-15 00:00 |
13:33:36.92 |
-55:11:16.9 |
HIP 66366 |
22.59 |
| 2026-06-15 12:00 |
13:33:34.99 |
-55:10:52.8 |
HIP 66366 |
22.93 |
| 2026-06-16 00:00 |
13:33:33.09 |
-55:10:28.6 |
HIP 66366 |
23.28 |
| 2026-06-16 12:00 |
13:33:31.22 |
-55:10:04.4 |
HIP 66366 |
23.64 |
| 2026-06-17 00:00 |
13:33:29.38 |
-55:09:40.2 |
HIP 66366 |
23.99 |
| 2026-06-17 12:00 |
13:33:27.56 |
-55:09:16.0 |
HIP 66366 |
24.34 |
| 2026-06-18 00:00 |
13:33:25.77 |
-55:08:51.7 |
HIP 66366 |
24.69 |
| 2026-06-18 12:00 |
13:33:24.02 |
-55:08:27.4 |
HIP 66366 |
25.05 |
| 2026-06-19 00:00 |
13:33:22.29 |
-55:08:03.0 |
HIP 66366 |
25.40 |
| 2026-06-19 12:00 |
13:33:20.58 |
-55:07:38.7 |
HIP 66366 |
25.76 |
| 2026-06-20 00:00 |
13:33:18.91 |
-55:07:14.3 |
HIP 66366 |
26.11 |
| 2026-06-20 12:00 |
13:33:17.27 |
-55:06:49.9 |
HIP 66355 |
26.29 |
| 2026-06-21 00:00 |
13:33:15.65 |
-55:06:25.4 |
HIP 66355 |
26.35 |
| 2026-06-21 12:00 |
13:33:14.06 |
-55:06:01.0 |
HIP 66355 |
26.41 |
| 2026-06-22 00:00 |
13:33:12.50 |
-55:05:36.5 |
HIP 66355 |
26.47 |