| Parameter |
Value |
| Designation |
471P/LINEAR-Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-12-20T07:38:00.384000Z |
| Orbit solution date (soln_date, UTC) |
2025-02-28T13:42:36Z |
| Obs used |
911 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
16.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2010-12-31T07:04:42.816000Z |
| Discovery magnitude (MPC) |
19.40 |
| Discovery observatory (MPC) |
704 · Lincoln Laboratory ETS, New Mexico |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-07-24.0000000 |
| e |
0.62777839 |
| q (au) |
2.123265 |
| a (au) |
5.704303 |
| i (deg) |
4.790901 |
| Ω (om, deg) |
283.347061 |
| ω (w, deg) |
94.964365 |
| M (ma, deg) |
349.197793 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.726 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.726 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.893 |
| k |
1.000 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2023-05-24 |
2023-07-28 |
+10.4044 |
-3.520 |
| 2023-07-28 |
2023-12-18 |
+2.8020 |
-0.914 |
| 2023-12-22 |
2025-02-27 |
-10.3387 |
+2.991 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
10:46:13.67 |
+04:03:14.4 |
HIP 52591 |
24.56 |
| 2026-09-20 12:00 |
10:46:30.86 |
+04:01:21.6 |
HIP 52719 |
25.84 |
| 2026-09-21 00:00 |
10:46:48.02 |
+03:59:28.9 |
HIP 52719 |
27.63 |
| 2026-09-21 12:00 |
10:47:05.14 |
+03:57:36.2 |
HIP 52869 |
24.30 |
| 2026-09-22 00:00 |
10:47:22.23 |
+03:55:43.6 |
HIP 52869 |
19.98 |
| 2026-09-22 12:00 |
10:47:39.28 |
+03:53:51.1 |
HIP 52869 |
15.87 |
| 2026-09-23 00:00 |
10:47:56.29 |
+03:51:58.6 |
HIP 52869 |
12.16 |
| 2026-09-23 12:00 |
10:48:13.27 |
+03:50:06.3 |
HIP 52869 |
9.32 |
| 2026-09-24 00:00 |
10:48:30.21 |
+03:48:14.0 |
HIP 52869 |
8.30 |
| 2026-09-24 12:00 |
10:48:47.10 |
+03:46:21.8 |
HIP 52869 |
9.67 |
| 2026-09-25 00:00 |
10:49:03.96 |
+03:44:29.7 |
HIP 52869 |
12.67 |
| 2026-09-25 12:00 |
10:49:20.78 |
+03:42:37.6 |
HIP 52919 |
16.23 |
| 2026-09-26 00:00 |
10:49:37.56 |
+03:40:45.7 |
HIP 52919 |
14.78 |
| 2026-09-26 12:00 |
10:49:54.30 |
+03:38:53.9 |
HIP 52919 |
14.67 |
| 2026-09-27 00:00 |
10:50:11.00 |
+03:37:02.2 |
HIP 53026 |
11.59 |
| 2026-09-27 12:00 |
10:50:27.66 |
+03:35:10.5 |
HIP 53026 |
7.33 |
| 2026-09-28 00:00 |
10:50:44.27 |
+03:33:19.0 |
HIP 53026 |
3.83 |
| 2026-09-28 12:00 |
10:51:00.84 |
+03:31:27.6 |
HIP 53026 |
4.09 |
| 2026-09-29 00:00 |
10:51:17.37 |
+03:29:36.4 |
HIP 53026 |
7.73 |
| 2026-09-29 12:00 |
10:51:33.86 |
+03:27:45.2 |
HIP 53026 |
11.98 |
| 2026-09-30 00:00 |
10:51:50.29 |
+03:25:54.2 |
HIP 53026 |
16.36 |
| 2026-09-30 12:00 |
10:52:06.69 |
+03:24:03.3 |
HIP 53026 |
20.78 |
| 2026-10-01 00:00 |
10:52:23.04 |
+03:22:12.5 |
HIP 53142 |
23.80 |
| 2026-10-01 12:00 |
10:52:39.34 |
+03:20:21.9 |
HIP 53142 |
26.25 |
| 2026-10-02 00:00 |
10:52:55.60 |
+03:18:31.4 |
HIP 53286 |
27.68 |
| 2026-10-02 12:00 |
10:53:11.81 |
+03:16:41.0 |
HIP 53286 |
27.48 |
| 2026-10-03 00:00 |
10:53:27.97 |
+03:14:50.8 |
HIP 53286 |
27.99 |
| 2026-10-03 12:00 |
10:53:44.08 |
+03:13:00.8 |
HIP 53286 |
29.18 |
| 2026-10-04 00:00 |
10:54:00.15 |
+03:11:10.9 |
HIP 53286 |
30.95 |
| 2026-10-04 12:00 |
10:54:16.16 |
+03:09:21.1 |
HIP 53284 |
30.49 |
| 2026-10-05 00:00 |
10:54:32.13 |
+03:07:31.6 |
HIP 53284 |
29.80 |
| 2026-10-05 12:00 |
10:54:48.04 |
+03:05:42.2 |
HIP 53284 |
29.74 |
| 2026-10-06 00:00 |
10:55:03.90 |
+03:03:52.9 |
HIP 53284 |
30.32 |
| 2026-10-06 12:00 |
10:55:19.71 |
+03:02:03.9 |
HIP 53284 |
31.48 |
| 2026-10-07 00:00 |
10:55:35.47 |
+03:00:15.0 |
HIP 53512 |
32.56 |
| 2026-10-07 12:00 |
10:55:51.17 |
+02:58:26.4 |
HIP 53512 |
32.10 |
| 2026-10-08 00:00 |
10:56:06.82 |
+02:56:37.9 |
HIP 53512 |
32.22 |
| 2026-10-08 12:00 |
10:56:22.41 |
+02:54:49.6 |
HIP 53592 |
29.85 |
| 2026-10-09 00:00 |
10:56:37.95 |
+02:53:01.6 |
HIP 53592 |
25.82 |
| 2026-10-09 12:00 |
10:56:53.43 |
+02:51:13.7 |
HIP 53592 |
21.90 |
| 2026-10-10 00:00 |
10:57:08.85 |
+02:49:26.1 |
HIP 53592 |
18.15 |
| 2026-10-10 12:00 |
10:57:24.22 |
+02:47:38.7 |
HIP 53592 |
14.68 |
| 2026-10-11 00:00 |
10:57:39.52 |
+02:45:51.5 |
HIP 53592 |
11.73 |