메타데이터
| 항목 |
값 |
| Designation |
C/1931 P1 (Ryves) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1931-08-25T21:54:00Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
25 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1931-08-07.0000000 |
| e |
0.99932600 |
| q (au) |
0.074924 |
| a (au) |
111.163205 |
| i (deg) |
169.288100 |
| Ω (om, deg) |
102.277600 |
| ω (w, deg) |
168.145500 |
| M (ma, deg) |
-0.015904 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
07:51:24.93 |
+18:23:41.5 |
HIP 38332 |
17.06 |
| 2026-07-29 12:00 |
07:51:26.06 |
+18:23:38.4 |
HIP 38332 |
17.18 |
| 2026-07-30 00:00 |
07:51:27.18 |
+18:23:35.2 |
HIP 38332 |
17.30 |
| 2026-07-30 12:00 |
07:51:28.30 |
+18:23:32.1 |
HIP 38332 |
17.43 |
| 2026-07-31 00:00 |
07:51:29.41 |
+18:23:28.9 |
HIP 38332 |
17.56 |
| 2026-07-31 12:00 |
07:51:30.53 |
+18:23:25.8 |
HIP 38332 |
17.69 |
| 2026-08-01 00:00 |
07:51:31.64 |
+18:23:22.6 |
HIP 38332 |
17.82 |
| 2026-08-01 12:00 |
07:51:32.75 |
+18:23:19.5 |
HIP 38332 |
17.96 |
| 2026-08-02 00:00 |
07:51:33.86 |
+18:23:16.3 |
HIP 38332 |
18.10 |
| 2026-08-02 12:00 |
07:51:34.97 |
+18:23:13.2 |
HIP 38332 |
18.25 |
| 2026-08-03 00:00 |
07:51:36.07 |
+18:23:10.0 |
HIP 38332 |
18.39 |
| 2026-08-03 12:00 |
07:51:37.18 |
+18:23:06.9 |
HIP 38332 |
18.54 |
| 2026-08-04 00:00 |
07:51:38.28 |
+18:23:03.7 |
HIP 38332 |
18.69 |
| 2026-08-04 12:00 |
07:51:39.37 |
+18:23:00.6 |
HIP 38332 |
18.85 |
| 2026-08-05 00:00 |
07:51:40.47 |
+18:22:57.4 |
HIP 38332 |
19.00 |
| 2026-08-05 12:00 |
07:51:41.56 |
+18:22:54.3 |
HIP 38332 |
19.16 |
| 2026-08-06 00:00 |
07:51:42.65 |
+18:22:51.1 |
HIP 38332 |
19.32 |
| 2026-08-06 12:00 |
07:51:43.74 |
+18:22:48.0 |
HIP 38332 |
19.48 |
| 2026-08-07 00:00 |
07:51:44.82 |
+18:22:44.8 |
HIP 38332 |
19.64 |
| 2026-08-07 12:00 |
07:51:45.90 |
+18:22:41.7 |
HIP 38332 |
19.81 |
| 2026-08-08 00:00 |
07:51:46.98 |
+18:22:38.5 |
HIP 38332 |
19.97 |
| 2026-08-08 12:00 |
07:51:48.05 |
+18:22:35.4 |
HIP 38332 |
20.14 |
| 2026-08-09 00:00 |
07:51:49.12 |
+18:22:32.2 |
HIP 38332 |
20.31 |
| 2026-08-09 12:00 |
07:51:50.19 |
+18:22:29.1 |
HIP 38332 |
20.48 |
| 2026-08-10 00:00 |
07:51:51.26 |
+18:22:26.0 |
HIP 38332 |
20.66 |
| 2026-08-10 12:00 |
07:51:52.32 |
+18:22:22.8 |
HIP 38332 |
20.83 |
| 2026-08-11 00:00 |
07:51:53.37 |
+18:22:19.7 |
HIP 38332 |
21.01 |
| 2026-08-11 12:00 |
07:51:54.43 |
+18:22:16.6 |
HIP 38332 |
21.18 |
| 2026-08-12 00:00 |
07:51:55.48 |
+18:22:13.5 |
HIP 38332 |
21.36 |
| 2026-08-12 12:00 |
07:51:56.53 |
+18:22:10.3 |
HIP 38332 |
21.54 |
| 2026-08-13 00:00 |
07:51:57.57 |
+18:22:07.2 |
HIP 38332 |
21.72 |
| 2026-08-13 12:00 |
07:51:58.61 |
+18:22:04.1 |
HIP 38332 |
21.90 |
| 2026-08-14 00:00 |
07:51:59.64 |
+18:22:01.0 |
HIP 38332 |
22.08 |
| 2026-08-14 12:00 |
07:52:00.67 |
+18:21:57.9 |
HIP 38332 |
22.26 |
| 2026-08-15 00:00 |
07:52:01.70 |
+18:21:54.8 |
HIP 38332 |
22.44 |
| 2026-08-15 12:00 |
07:52:02.72 |
+18:21:51.7 |
HIP 38332 |
22.63 |
| 2026-08-16 00:00 |
07:52:03.74 |
+18:21:48.6 |
HIP 38332 |
22.81 |
| 2026-08-16 12:00 |
07:52:04.75 |
+18:21:45.6 |
HIP 38332 |
22.99 |
| 2026-08-17 00:00 |
07:52:05.76 |
+18:21:42.5 |
HIP 38332 |
23.18 |
| 2026-08-17 12:00 |
07:52:06.77 |
+18:21:39.4 |
HIP 38332 |
23.36 |
| 2026-08-18 00:00 |
07:52:07.77 |
+18:21:36.4 |
HIP 38332 |
23.55 |
| 2026-08-18 12:00 |
07:52:08.76 |
+18:21:33.3 |
HIP 38332 |
23.73 |
| 2026-08-19 00:00 |
07:52:09.75 |
+18:21:30.3 |
HIP 38332 |
23.92 |