| Parameter |
Value |
| Designation |
C/2000 SV74 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-30T12:44:48.128640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:06Z |
| Obs used |
2039 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
5.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-12-17.0000000 |
| e |
1.00486188 |
| q (au) |
3.541897 |
| a (au) |
-728.503515 |
| i (deg) |
75.236666 |
| Ω (om, deg) |
24.186314 |
| ω (w, deg) |
76.239354 |
| M (ma, deg) |
0.011552 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.901 + 3.631\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.901 |
| n |
3.631 |
| gf |
0.850 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.002 |
| 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 |
| 2000-10-21 |
2002-04-10 |
-2.1213 |
+1.220 |
| 2002-04-30 |
2005-04-05 |
-2.0066 |
+1.694 |
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 |
12:52:18.90 |
-52:09:39.3 |
HIP 62774 |
4.73 |
| 2026-06-01 12:00 |
12:52:16.57 |
-52:09:11.2 |
HIP 62774 |
4.22 |
| 2026-06-02 00:00 |
12:52:14.26 |
-52:08:43.1 |
HIP 62774 |
3.74 |
| 2026-06-02 12:00 |
12:52:11.98 |
-52:08:14.9 |
HIP 62774 |
3.30 |
| 2026-06-03 00:00 |
12:52:09.73 |
-52:07:46.7 |
HIP 62774 |
2.91 |
| 2026-06-03 12:00 |
12:52:07.52 |
-52:07:18.4 |
HIP 62774 |
2.60 |
| 2026-06-04 00:00 |
12:52:05.33 |
-52:06:50.1 |
HIP 62774 |
2.40 |
| 2026-06-04 12:00 |
12:52:03.18 |
-52:06:21.7 |
HIP 62774 |
2.34 |
| 2026-06-05 00:00 |
12:52:01.05 |
-52:05:53.3 |
HIP 62774 |
2.42 |
| 2026-06-05 12:00 |
12:51:58.96 |
-52:05:24.8 |
HIP 62774 |
2.63 |
| 2026-06-06 00:00 |
12:51:56.90 |
-52:04:56.3 |
HIP 62774 |
2.94 |
| 2026-06-06 12:00 |
12:51:54.86 |
-52:04:27.8 |
HIP 62774 |
3.32 |
| 2026-06-07 00:00 |
12:51:52.86 |
-52:03:59.2 |
HIP 62774 |
3.75 |
| 2026-06-07 12:00 |
12:51:50.90 |
-52:03:30.6 |
HIP 62774 |
4.21 |
| 2026-06-08 00:00 |
12:51:48.96 |
-52:03:01.9 |
HIP 62774 |
4.70 |
| 2026-06-08 12:00 |
12:51:47.05 |
-52:02:33.3 |
HIP 62774 |
5.20 |
| 2026-06-09 00:00 |
12:51:45.18 |
-52:02:04.6 |
HIP 62774 |
5.71 |
| 2026-06-09 12:00 |
12:51:43.34 |
-52:01:35.8 |
HIP 62774 |
6.23 |
| 2026-06-10 00:00 |
12:51:41.53 |
-52:01:07.1 |
HIP 62803 |
6.19 |
| 2026-06-10 12:00 |
12:51:39.75 |
-52:00:38.3 |
HIP 62803 |
6.06 |
| 2026-06-11 00:00 |
12:51:38.00 |
-52:00:09.6 |
HIP 62803 |
5.98 |
| 2026-06-11 12:00 |
12:51:36.29 |
-51:59:40.8 |
HIP 62803 |
5.94 |
| 2026-06-12 00:00 |
12:51:34.61 |
-51:59:12.0 |
HIP 62803 |
5.94 |
| 2026-06-12 12:00 |
12:51:32.96 |
-51:58:43.2 |
HIP 62803 |
5.99 |
| 2026-06-13 00:00 |
12:51:31.35 |
-51:58:14.4 |
HIP 62803 |
6.09 |
| 2026-06-13 12:00 |
12:51:29.76 |
-51:57:45.6 |
HIP 62803 |
6.22 |
| 2026-06-14 00:00 |
12:51:28.21 |
-51:57:16.7 |
HIP 62803 |
6.40 |
| 2026-06-14 12:00 |
12:51:26.70 |
-51:56:47.9 |
HIP 62803 |
6.60 |
| 2026-06-15 00:00 |
12:51:25.21 |
-51:56:19.1 |
HIP 62803 |
6.84 |
| 2026-06-15 12:00 |
12:51:23.76 |
-51:55:50.3 |
HIP 62681 |
6.90 |
| 2026-06-16 00:00 |
12:51:22.35 |
-51:55:21.5 |
HIP 62681 |
6.63 |
| 2026-06-16 12:00 |
12:51:20.96 |
-51:54:52.7 |
HIP 62681 |
6.39 |
| 2026-06-17 00:00 |
12:51:19.61 |
-51:54:24.0 |
HIP 62681 |
6.19 |
| 2026-06-17 12:00 |
12:51:18.29 |
-51:53:55.2 |
HIP 62681 |
6.04 |
| 2026-06-18 00:00 |
12:51:17.01 |
-51:53:26.5 |
HIP 62681 |
5.93 |
| 2026-06-18 12:00 |
12:51:15.76 |
-51:52:57.8 |
HIP 62681 |
5.87 |
| 2026-06-19 00:00 |
12:51:14.54 |
-51:52:29.1 |
HIP 62681 |
5.86 |
| 2026-06-19 12:00 |
12:51:13.36 |
-51:52:00.4 |
HIP 62681 |
5.90 |
| 2026-06-20 00:00 |
12:51:12.21 |
-51:51:31.8 |
HIP 62681 |
5.99 |
| 2026-06-20 12:00 |
12:51:11.09 |
-51:51:03.2 |
HIP 62681 |
6.12 |
| 2026-06-21 00:00 |
12:51:10.01 |
-51:50:34.6 |
HIP 62681 |
6.30 |
| 2026-06-21 12:00 |
12:51:08.96 |
-51:50:06.1 |
HIP 62681 |
6.51 |
| 2026-06-22 00:00 |
12:51:07.95 |
-51:49:37.6 |
HIP 62681 |
6.76 |