메타데이터
| 항목 |
값 |
| Designation |
C/1940 R2 (Cunningham) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1941-01-16T05:36:57.600000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
189 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1941-01-06.0000000 |
| e |
1.00048500 |
| q (au) |
0.367751 |
| a (au) |
-758.249484 |
| i (deg) |
49.894200 |
| Ω (om, deg) |
296.590500 |
| ω (w, deg) |
199.569000 |
| M (ma, deg) |
-0.000483 |
밝기
산란 + 전체 선형
$$
M_a = (5.846 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.846 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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) |
| 2026-05-12 00:00 |
20:21:35.34 |
-09:30:09.7 |
HIP 100524 |
22.95 |
| 2026-05-12 12:00 |
20:21:35.04 |
-09:30:08.1 |
HIP 100524 |
23.03 |
| 2026-05-13 00:00 |
20:21:34.72 |
-09:30:06.4 |
HIP 100524 |
23.11 |
| 2026-05-13 12:00 |
20:21:34.39 |
-09:30:04.9 |
HIP 100524 |
23.20 |
| 2026-05-14 00:00 |
20:21:34.06 |
-09:30:03.3 |
HIP 100524 |
23.28 |
| 2026-05-14 12:00 |
20:21:33.71 |
-09:30:01.8 |
HIP 100524 |
23.37 |
| 2026-05-15 00:00 |
20:21:33.36 |
-09:30:00.3 |
HIP 100524 |
23.46 |
| 2026-05-15 12:00 |
20:21:33.00 |
-09:29:58.9 |
HIP 100524 |
23.55 |
| 2026-05-16 00:00 |
20:21:32.63 |
-09:29:57.5 |
HIP 100524 |
23.64 |
| 2026-05-16 12:00 |
20:21:32.25 |
-09:29:56.1 |
HIP 100524 |
23.74 |
| 2026-05-17 00:00 |
20:21:31.87 |
-09:29:54.8 |
HIP 100524 |
23.84 |
| 2026-05-17 12:00 |
20:21:31.47 |
-09:29:53.5 |
HIP 100524 |
23.93 |
| 2026-05-18 00:00 |
20:21:31.07 |
-09:29:52.2 |
HIP 100524 |
24.03 |
| 2026-05-18 12:00 |
20:21:30.66 |
-09:29:51.0 |
HIP 100524 |
24.13 |
| 2026-05-19 00:00 |
20:21:30.24 |
-09:29:49.8 |
HIP 100524 |
24.24 |
| 2026-05-19 12:00 |
20:21:29.82 |
-09:29:48.7 |
HIP 100524 |
24.34 |
| 2026-05-20 00:00 |
20:21:29.38 |
-09:29:47.6 |
HIP 100524 |
24.45 |
| 2026-05-20 12:00 |
20:21:28.94 |
-09:29:46.5 |
HIP 100524 |
24.55 |
| 2026-05-21 00:00 |
20:21:28.49 |
-09:29:45.5 |
HIP 100524 |
24.66 |
| 2026-05-21 12:00 |
20:21:28.03 |
-09:29:44.5 |
HIP 100524 |
24.77 |
| 2026-05-22 00:00 |
20:21:27.56 |
-09:29:43.5 |
HIP 100524 |
24.89 |
| 2026-05-22 12:00 |
20:21:27.08 |
-09:29:42.6 |
HIP 100524 |
25.00 |
| 2026-05-23 00:00 |
20:21:26.60 |
-09:29:41.8 |
HIP 100524 |
25.12 |
| 2026-05-23 12:00 |
20:21:26.11 |
-09:29:40.9 |
HIP 100524 |
25.23 |
| 2026-05-24 00:00 |
20:21:25.61 |
-09:29:40.1 |
HIP 100524 |
25.35 |
| 2026-05-24 12:00 |
20:21:25.11 |
-09:29:39.4 |
HIP 100524 |
25.47 |
| 2026-05-25 00:00 |
20:21:24.59 |
-09:29:38.6 |
HIP 100524 |
25.59 |
| 2026-05-25 12:00 |
20:21:24.07 |
-09:29:37.9 |
HIP 100524 |
25.72 |
| 2026-05-26 00:00 |
20:21:23.54 |
-09:29:37.3 |
HIP 100524 |
25.84 |
| 2026-05-26 12:00 |
20:21:23.00 |
-09:29:36.7 |
HIP 100524 |
25.97 |
| 2026-05-27 00:00 |
20:21:22.46 |
-09:29:36.1 |
HIP 100524 |
26.10 |
| 2026-05-27 12:00 |
20:21:21.91 |
-09:29:35.6 |
HIP 100524 |
26.23 |
| 2026-05-28 00:00 |
20:21:21.35 |
-09:29:35.1 |
HIP 100524 |
26.36 |
| 2026-05-28 12:00 |
20:21:20.78 |
-09:29:34.6 |
HIP 100524 |
26.49 |
| 2026-05-29 00:00 |
20:21:20.20 |
-09:29:34.2 |
HIP 100524 |
26.63 |
| 2026-05-29 12:00 |
20:21:19.62 |
-09:29:33.8 |
HIP 100524 |
26.76 |
| 2026-05-30 00:00 |
20:21:19.03 |
-09:29:33.5 |
HIP 100524 |
26.90 |
| 2026-05-30 12:00 |
20:21:18.44 |
-09:29:33.2 |
HIP 100524 |
27.04 |
| 2026-05-31 00:00 |
20:21:17.83 |
-09:29:32.9 |
HIP 100524 |
27.18 |
| 2026-05-31 12:00 |
20:21:17.22 |
-09:29:32.7 |
HIP 100524 |
27.32 |
| 2026-06-01 00:00 |
20:21:16.60 |
-09:29:32.5 |
HIP 100524 |
27.46 |
| 2026-06-01 12:00 |
20:21:15.98 |
-09:29:32.4 |
HIP 100524 |
27.61 |
| 2026-06-02 00:00 |
20:21:15.35 |
-09:29:32.2 |
HIP 100524 |
27.76 |