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 |
0.998 |
| 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) |
| 2026-07-29 00:00 |
23:10:24.60 |
+66:08:42.5 |
HIP 114302 |
10.07 |
| 2026-07-29 12:00 |
23:10:20.97 |
+66:08:56.8 |
HIP 114302 |
9.86 |
| 2026-07-30 00:00 |
23:10:17.30 |
+66:09:11.0 |
HIP 114302 |
9.67 |
| 2026-07-30 12:00 |
23:10:13.61 |
+66:09:24.9 |
HIP 114302 |
9.49 |
| 2026-07-31 00:00 |
23:10:09.90 |
+66:09:38.6 |
HIP 114302 |
9.32 |
| 2026-07-31 12:00 |
23:10:06.16 |
+66:09:52.1 |
HIP 114302 |
9.16 |
| 2026-08-01 00:00 |
23:10:02.39 |
+66:10:05.4 |
HIP 114302 |
9.02 |
| 2026-08-01 12:00 |
23:09:58.59 |
+66:10:18.5 |
HIP 114302 |
8.90 |
| 2026-08-02 00:00 |
23:09:54.77 |
+66:10:31.3 |
HIP 114302 |
8.79 |
| 2026-08-02 12:00 |
23:09:50.92 |
+66:10:43.9 |
HIP 114302 |
8.69 |
| 2026-08-03 00:00 |
23:09:47.05 |
+66:10:56.3 |
HIP 114302 |
8.62 |
| 2026-08-03 12:00 |
23:09:43.16 |
+66:11:08.5 |
HIP 114302 |
8.56 |
| 2026-08-04 00:00 |
23:09:39.23 |
+66:11:20.4 |
HIP 114302 |
8.52 |
| 2026-08-04 12:00 |
23:09:35.29 |
+66:11:32.2 |
HIP 114302 |
8.50 |
| 2026-08-05 00:00 |
23:09:31.32 |
+66:11:43.6 |
HIP 114302 |
8.50 |
| 2026-08-05 12:00 |
23:09:27.32 |
+66:11:54.9 |
HIP 114302 |
8.51 |
| 2026-08-06 00:00 |
23:09:23.30 |
+66:12:05.9 |
HIP 114302 |
8.55 |
| 2026-08-06 12:00 |
23:09:19.26 |
+66:12:16.7 |
HIP 114302 |
8.60 |
| 2026-08-07 00:00 |
23:09:15.20 |
+66:12:27.3 |
HIP 114302 |
8.68 |
| 2026-08-07 12:00 |
23:09:11.11 |
+66:12:37.6 |
HIP 114302 |
8.77 |
| 2026-08-08 00:00 |
23:09:07.00 |
+66:12:47.7 |
HIP 114302 |
8.87 |
| 2026-08-08 12:00 |
23:09:02.87 |
+66:12:57.5 |
HIP 114302 |
9.00 |
| 2026-08-09 00:00 |
23:08:58.71 |
+66:13:07.1 |
HIP 114302 |
9.14 |
| 2026-08-09 12:00 |
23:08:54.53 |
+66:13:16.5 |
HIP 114302 |
9.30 |
| 2026-08-10 00:00 |
23:08:50.34 |
+66:13:25.6 |
HIP 114302 |
9.47 |
| 2026-08-10 12:00 |
23:08:46.12 |
+66:13:34.5 |
HIP 114302 |
9.65 |
| 2026-08-11 00:00 |
23:08:41.88 |
+66:13:43.2 |
HIP 114170 |
9.33 |
| 2026-08-11 12:00 |
23:08:37.62 |
+66:13:51.5 |
HIP 114170 |
8.88 |
| 2026-08-12 00:00 |
23:08:33.34 |
+66:13:59.7 |
HIP 114170 |
8.43 |
| 2026-08-12 12:00 |
23:08:29.04 |
+66:14:07.6 |
HIP 114170 |
7.98 |
| 2026-08-13 00:00 |
23:08:24.72 |
+66:14:15.3 |
HIP 114170 |
7.54 |
| 2026-08-13 12:00 |
23:08:20.38 |
+66:14:22.7 |
HIP 114170 |
7.09 |
| 2026-08-14 00:00 |
23:08:16.02 |
+66:14:29.8 |
HIP 114170 |
6.64 |
| 2026-08-14 12:00 |
23:08:11.65 |
+66:14:36.7 |
HIP 114170 |
6.19 |
| 2026-08-15 00:00 |
23:08:07.26 |
+66:14:43.4 |
HIP 114170 |
5.75 |
| 2026-08-15 12:00 |
23:08:02.85 |
+66:14:49.8 |
HIP 114170 |
5.31 |
| 2026-08-16 00:00 |
23:07:58.42 |
+66:14:55.9 |
HIP 114170 |
4.87 |
| 2026-08-16 12:00 |
23:07:53.98 |
+66:15:01.8 |
HIP 114170 |
4.43 |
| 2026-08-17 00:00 |
23:07:49.52 |
+66:15:07.5 |
HIP 114170 |
4.00 |
| 2026-08-17 12:00 |
23:07:45.04 |
+66:15:12.9 |
HIP 114170 |
3.58 |
| 2026-08-18 00:00 |
23:07:40.55 |
+66:15:18.0 |
HIP 114170 |
3.18 |
| 2026-08-18 12:00 |
23:07:36.04 |
+66:15:22.9 |
HIP 114170 |
2.79 |
| 2026-08-19 00:00 |
23:07:31.52 |
+66:15:27.5 |
HIP 114170 |
2.43 |