메타데이터
| 항목 |
값 |
| Designation |
C/1991 C3 (McNaught-Russell) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1990-10-18T13:20:57.874560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:41Z |
| Obs used |
42 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1991-06-24.0000000 |
| e |
1.00249603 |
| q (au) |
4.777706 |
| a (au) |
-1914.125633 |
| i (deg) |
113.443762 |
| Ω (om, deg) |
161.705796 |
| ω (w, deg) |
320.929727 |
| M (ma, deg) |
0.002924 |
밝기
산란 + 전체 선형
$$
M_a = (9.686 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.686 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.502 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
23:07:28.65 |
+64:34:07.1 |
HIP 114285 |
18.78 |
| 2026-03-26 12:00 |
23:07:32.92 |
+64:34:18.9 |
HIP 114285 |
18.40 |
| 2026-03-27 00:00 |
23:07:37.18 |
+64:34:30.9 |
HIP 114285 |
18.02 |
| 2026-03-27 12:00 |
23:07:41.42 |
+64:34:43.1 |
HIP 114285 |
17.65 |
| 2026-03-28 00:00 |
23:07:45.65 |
+64:34:55.5 |
HIP 114285 |
17.27 |
| 2026-03-28 12:00 |
23:07:49.87 |
+64:35:08.1 |
HIP 114285 |
16.90 |
| 2026-03-29 00:00 |
23:07:54.07 |
+64:35:21.0 |
HIP 114285 |
16.54 |
| 2026-03-29 12:00 |
23:07:58.26 |
+64:35:34.1 |
HIP 114285 |
16.18 |
| 2026-03-30 00:00 |
23:08:02.44 |
+64:35:47.3 |
HIP 114285 |
15.82 |
| 2026-03-30 12:00 |
23:08:06.60 |
+64:36:00.8 |
HIP 114285 |
15.47 |
| 2026-03-31 00:00 |
23:08:10.74 |
+64:36:14.5 |
HIP 114285 |
15.12 |
| 2026-03-31 12:00 |
23:08:14.87 |
+64:36:28.4 |
HIP 114285 |
14.78 |
| 2026-04-01 00:00 |
23:08:18.98 |
+64:36:42.5 |
HIP 114285 |
14.45 |
| 2026-04-01 12:00 |
23:08:23.08 |
+64:36:56.9 |
HIP 114285 |
14.12 |
| 2026-04-02 00:00 |
23:08:27.17 |
+64:37:11.4 |
HIP 114285 |
13.80 |
| 2026-04-02 12:00 |
23:08:31.23 |
+64:37:26.1 |
HIP 114285 |
13.49 |
| 2026-04-03 00:00 |
23:08:35.28 |
+64:37:41.1 |
HIP 114285 |
13.18 |
| 2026-04-03 12:00 |
23:08:39.32 |
+64:37:56.2 |
HIP 114285 |
12.89 |
| 2026-04-04 00:00 |
23:08:43.33 |
+64:38:11.5 |
HIP 114285 |
12.60 |
| 2026-04-04 12:00 |
23:08:47.33 |
+64:38:27.1 |
HIP 114285 |
12.32 |
| 2026-04-05 00:00 |
23:08:51.31 |
+64:38:42.8 |
HIP 114285 |
12.06 |
| 2026-04-05 12:00 |
23:08:55.28 |
+64:38:58.7 |
HIP 114285 |
11.81 |
| 2026-04-06 00:00 |
23:08:59.22 |
+64:39:14.9 |
HIP 114285 |
11.57 |
| 2026-04-06 12:00 |
23:09:03.15 |
+64:39:31.2 |
HIP 114285 |
11.34 |
| 2026-04-07 00:00 |
23:09:07.06 |
+64:39:47.7 |
HIP 114285 |
11.13 |
| 2026-04-07 12:00 |
23:09:10.95 |
+64:40:04.4 |
HIP 114285 |
10.93 |
| 2026-04-08 00:00 |
23:09:14.83 |
+64:40:21.3 |
HIP 114285 |
10.75 |
| 2026-04-08 12:00 |
23:09:18.68 |
+64:40:38.4 |
HIP 114285 |
10.58 |
| 2026-04-09 00:00 |
23:09:22.51 |
+64:40:55.7 |
HIP 114285 |
10.44 |
| 2026-04-09 12:00 |
23:09:26.33 |
+64:41:13.2 |
HIP 114285 |
10.31 |
| 2026-04-10 00:00 |
23:09:30.12 |
+64:41:30.9 |
HIP 114285 |
10.20 |
| 2026-04-10 12:00 |
23:09:33.89 |
+64:41:48.7 |
HIP 114285 |
10.11 |
| 2026-04-11 00:00 |
23:09:37.65 |
+64:42:06.7 |
HIP 114285 |
10.04 |
| 2026-04-11 12:00 |
23:09:41.38 |
+64:42:24.9 |
HIP 114285 |
9.99 |
| 2026-04-12 00:00 |
23:09:45.09 |
+64:42:43.3 |
HIP 114285 |
9.96 |
| 2026-04-12 12:00 |
23:09:48.78 |
+64:43:01.9 |
HIP 114285 |
9.96 |
| 2026-04-13 00:00 |
23:09:52.45 |
+64:43:20.7 |
HIP 114285 |
9.97 |
| 2026-04-13 12:00 |
23:09:56.09 |
+64:43:39.6 |
HIP 114285 |
10.01 |
| 2026-04-14 00:00 |
23:09:59.72 |
+64:43:58.7 |
HIP 114356 |
10.00 |
| 2026-04-14 12:00 |
23:10:03.32 |
+64:44:18.0 |
HIP 114356 |
9.79 |
| 2026-04-15 00:00 |
23:10:06.90 |
+64:44:37.4 |
HIP 114356 |
9.60 |
| 2026-04-15 12:00 |
23:10:10.46 |
+64:44:57.0 |
HIP 114356 |
9.42 |
| 2026-04-16 00:00 |
23:10:13.99 |
+64:45:16.8 |
HIP 114356 |
9.27 |