메타데이터
| 항목 |
값 |
| Designation |
C/1976 D2 (Schuster) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1975-01-14T16:56:09.628800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
54 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
4.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1976-07-08.0000000 |
| e |
1.00111947 |
| q (au) |
6.879571 |
| a (au) |
-6145.360914 |
| i (deg) |
112.026906 |
| Ω (om, deg) |
22.785994 |
| ω (w, deg) |
193.366827 |
| M (ma, deg) |
0.001105 |
밝기
산란 + 전체 선형
$$
M_a = (-1.560 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-1.560 |
| n |
6.000 |
| gf |
0.971 |
| gb |
-0.796 |
| 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 |
02:29:52.29 |
-07:23:21.6 |
HIP 11508 |
22.15 |
| 2026-07-29 12:00 |
02:29:52.32 |
-07:23:29.5 |
HIP 11508 |
22.17 |
| 2026-07-30 00:00 |
02:29:52.35 |
-07:23:37.3 |
HIP 11508 |
22.18 |
| 2026-07-30 12:00 |
02:29:52.36 |
-07:23:45.3 |
HIP 11508 |
22.19 |
| 2026-07-31 00:00 |
02:29:52.36 |
-07:23:53.3 |
HIP 11508 |
22.21 |
| 2026-07-31 12:00 |
02:29:52.34 |
-07:24:01.4 |
HIP 11508 |
22.21 |
| 2026-08-01 00:00 |
02:29:52.31 |
-07:24:09.5 |
HIP 11508 |
22.22 |
| 2026-08-01 12:00 |
02:29:52.27 |
-07:24:17.7 |
HIP 11508 |
22.22 |
| 2026-08-02 00:00 |
02:29:52.22 |
-07:24:26.0 |
HIP 11508 |
22.23 |
| 2026-08-02 12:00 |
02:29:52.15 |
-07:24:34.3 |
HIP 11508 |
22.23 |
| 2026-08-03 00:00 |
02:29:52.07 |
-07:24:42.7 |
HIP 11508 |
22.22 |
| 2026-08-03 12:00 |
02:29:51.98 |
-07:24:51.2 |
HIP 11508 |
22.22 |
| 2026-08-04 00:00 |
02:29:51.87 |
-07:24:59.7 |
HIP 11508 |
22.21 |
| 2026-08-04 12:00 |
02:29:51.75 |
-07:25:08.3 |
HIP 11508 |
22.20 |
| 2026-08-05 00:00 |
02:29:51.62 |
-07:25:16.9 |
HIP 11508 |
22.19 |
| 2026-08-05 12:00 |
02:29:51.47 |
-07:25:25.6 |
HIP 11508 |
22.18 |
| 2026-08-06 00:00 |
02:29:51.31 |
-07:25:34.4 |
HIP 11508 |
22.16 |
| 2026-08-06 12:00 |
02:29:51.14 |
-07:25:43.2 |
HIP 11508 |
22.14 |
| 2026-08-07 00:00 |
02:29:50.95 |
-07:25:52.1 |
HIP 11508 |
22.13 |
| 2026-08-07 12:00 |
02:29:50.75 |
-07:26:01.0 |
HIP 11508 |
22.10 |
| 2026-08-08 00:00 |
02:29:50.54 |
-07:26:10.0 |
HIP 11508 |
22.08 |
| 2026-08-08 12:00 |
02:29:50.31 |
-07:26:19.1 |
HIP 11508 |
22.05 |
| 2026-08-09 00:00 |
02:29:50.07 |
-07:26:28.1 |
HIP 11508 |
22.03 |
| 2026-08-09 12:00 |
02:29:49.82 |
-07:26:37.3 |
HIP 11508 |
22.00 |
| 2026-08-10 00:00 |
02:29:49.55 |
-07:26:46.5 |
HIP 11508 |
21.97 |
| 2026-08-10 12:00 |
02:29:49.27 |
-07:26:55.8 |
HIP 11508 |
21.93 |
| 2026-08-11 00:00 |
02:29:48.98 |
-07:27:05.1 |
HIP 11508 |
21.90 |
| 2026-08-11 12:00 |
02:29:48.67 |
-07:27:14.4 |
HIP 11508 |
21.86 |
| 2026-08-12 00:00 |
02:29:48.35 |
-07:27:23.8 |
HIP 11508 |
21.83 |
| 2026-08-12 12:00 |
02:29:48.02 |
-07:27:33.3 |
HIP 11508 |
21.79 |
| 2026-08-13 00:00 |
02:29:47.68 |
-07:27:42.8 |
HIP 11508 |
21.75 |
| 2026-08-13 12:00 |
02:29:47.32 |
-07:27:52.4 |
HIP 11508 |
21.70 |
| 2026-08-14 00:00 |
02:29:46.94 |
-07:28:02.0 |
HIP 11508 |
21.66 |
| 2026-08-14 12:00 |
02:29:46.56 |
-07:28:11.6 |
HIP 11508 |
21.61 |
| 2026-08-15 00:00 |
02:29:46.16 |
-07:28:21.3 |
HIP 11508 |
21.57 |
| 2026-08-15 12:00 |
02:29:45.75 |
-07:28:31.1 |
HIP 11508 |
21.52 |
| 2026-08-16 00:00 |
02:29:45.32 |
-07:28:40.9 |
HIP 11508 |
21.47 |
| 2026-08-16 12:00 |
02:29:44.89 |
-07:28:50.7 |
HIP 11508 |
21.42 |
| 2026-08-17 00:00 |
02:29:44.43 |
-07:29:00.6 |
HIP 11508 |
21.37 |
| 2026-08-17 12:00 |
02:29:43.97 |
-07:29:10.5 |
HIP 11508 |
21.32 |
| 2026-08-18 00:00 |
02:29:43.49 |
-07:29:20.4 |
HIP 11508 |
21.26 |
| 2026-08-18 12:00 |
02:29:43.00 |
-07:29:30.4 |
HIP 11508 |
21.21 |
| 2026-08-19 00:00 |
02:29:42.50 |
-07:29:40.5 |
HIP 11508 |
21.15 |