| Parameter |
Value |
| Designation |
C/2025 V2 (Rankin) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-03-22T23:08:37.420800Z |
| Orbit solution date (soln_date, UTC) |
2026-05-28T12:12:16Z |
| Obs used |
529 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
9.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-11-02T11:21:58.089600Z |
| Discovery magnitude (MPC) |
19.86 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2026-02-01.0000000 |
| e |
1.00069452 |
| q (au) |
1.952528 |
| a (au) |
-2811.326369 |
| i (deg) |
37.282946 |
| Ω (om, deg) |
138.082163 |
| ω (w, deg) |
102.710674 |
| M (ma, deg) |
-0.002744 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.776 + 3.777\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.776 |
| n |
3.777 |
| gf |
0.987 |
| gb |
-0.949 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
09:18:36.71 |
+23:24:23.6 |
HIP 45606 |
22.89 |
| 2026-06-01 12:00 |
09:18:58.59 |
+23:24:13.3 |
HIP 45606 |
25.70 |
| 2026-06-02 00:00 |
09:19:20.67 |
+23:24:02.0 |
HIP 45606 |
29.13 |
| 2026-06-02 12:00 |
09:19:42.93 |
+23:23:49.8 |
HIP 45606 |
33.02 |
| 2026-06-03 00:00 |
09:20:05.39 |
+23:23:36.7 |
HIP 45884 |
34.85 |
| 2026-06-03 12:00 |
09:20:28.04 |
+23:23:22.6 |
HIP 45884 |
32.34 |
| 2026-06-04 00:00 |
09:20:50.88 |
+23:23:07.6 |
HIP 45884 |
30.50 |
| 2026-06-04 12:00 |
09:21:13.90 |
+23:22:51.7 |
HIP 45884 |
29.47 |
| 2026-06-05 00:00 |
09:21:37.11 |
+23:22:34.8 |
HIP 45884 |
29.36 |
| 2026-06-05 12:00 |
09:22:00.51 |
+23:22:17.0 |
HIP 45884 |
30.22 |
| 2026-06-06 00:00 |
09:22:24.10 |
+23:21:58.2 |
HIP 46119 |
29.21 |
| 2026-06-06 12:00 |
09:22:47.87 |
+23:21:38.6 |
HIP 46119 |
24.60 |
| 2026-06-07 00:00 |
09:23:11.83 |
+23:21:18.0 |
HIP 46119 |
20.39 |
| 2026-06-07 12:00 |
09:23:35.97 |
+23:20:56.5 |
HIP 46119 |
16.93 |
| 2026-06-08 00:00 |
09:24:00.29 |
+23:20:34.0 |
HIP 46119 |
14.80 |
| 2026-06-08 12:00 |
09:24:24.80 |
+23:20:10.7 |
HIP 46119 |
14.64 |
| 2026-06-09 00:00 |
09:24:49.48 |
+23:19:46.4 |
HIP 46119 |
16.57 |
| 2026-06-09 12:00 |
09:25:14.35 |
+23:19:21.3 |
HIP 46119 |
20.01 |
| 2026-06-10 00:00 |
09:25:39.40 |
+23:18:55.2 |
HIP 46119 |
24.37 |
| 2026-06-10 12:00 |
09:26:04.63 |
+23:18:28.2 |
HIP 46427 |
27.21 |
| 2026-06-11 00:00 |
09:26:30.04 |
+23:18:00.3 |
HIP 46427 |
21.36 |
| 2026-06-11 12:00 |
09:26:55.62 |
+23:17:31.5 |
HIP 46427 |
15.47 |
| 2026-06-12 00:00 |
09:27:21.39 |
+23:17:01.8 |
HIP 46427 |
9.55 |
| 2026-06-12 12:00 |
09:27:47.33 |
+23:16:31.2 |
HIP 46427 |
3.64 |
| 2026-06-13 00:00 |
09:28:13.44 |
+23:15:59.8 |
HIP 46427 |
2.65 |
| 2026-06-13 12:00 |
09:28:39.73 |
+23:15:27.4 |
HIP 46427 |
8.60 |
| 2026-06-14 00:00 |
09:29:06.19 |
+23:14:54.2 |
HIP 46427 |
14.69 |
| 2026-06-14 12:00 |
09:29:32.83 |
+23:14:20.0 |
HIP 46427 |
20.82 |
| 2026-06-15 00:00 |
09:29:59.64 |
+23:13:45.0 |
HIP 46427 |
27.01 |
| 2026-06-15 12:00 |
09:30:26.62 |
+23:13:09.1 |
HIP 46750 |
23.18 |
| 2026-06-16 00:00 |
09:30:53.77 |
+23:12:32.4 |
HIP 46750 |
18.39 |
| 2026-06-16 12:00 |
09:31:21.10 |
+23:11:54.7 |
HIP 46750 |
14.74 |
| 2026-06-17 00:00 |
09:31:48.59 |
+23:11:16.2 |
HIP 46750 |
13.24 |
| 2026-06-17 12:00 |
09:32:16.24 |
+23:10:36.9 |
HIP 46750 |
14.65 |
| 2026-06-18 00:00 |
09:32:44.07 |
+23:09:56.7 |
HIP 46750 |
18.34 |
| 2026-06-18 12:00 |
09:33:12.06 |
+23:09:15.6 |
HIP 46938 |
20.99 |
| 2026-06-19 00:00 |
09:33:40.21 |
+23:08:33.7 |
HIP 46938 |
19.19 |
| 2026-06-19 12:00 |
09:34:08.53 |
+23:07:51.0 |
HIP 46938 |
19.52 |
| 2026-06-20 00:00 |
09:34:37.02 |
+23:07:07.4 |
HIP 47112 |
20.58 |
| 2026-06-20 12:00 |
09:35:05.66 |
+23:06:23.0 |
HIP 47112 |
14.46 |
| 2026-06-21 00:00 |
09:35:34.46 |
+23:05:37.7 |
HIP 47112 |
9.06 |
| 2026-06-21 12:00 |
09:36:03.43 |
+23:04:51.6 |
HIP 47112 |
6.64 |
| 2026-06-22 00:00 |
09:36:32.55 |
+23:04:04.7 |
HIP 47112 |
9.82 |