메타데이터
| 항목 |
값 |
| Designation |
C/1968 L1 (Whitaker-Thomas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1968-06-04T12:06:59.990400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
23 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1968-07-02.0000000 |
| e |
1.00000000 |
| q (au) |
1.234006 |
| a (au) |
- |
| i (deg) |
61.767368 |
| Ω (om, deg) |
254.716109 |
| ω (w, deg) |
353.977969 |
| M (ma, deg) |
- |
밝기
산란 + 전체 선형
$$
M_a = (9.895 + 3.317\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.895 |
| n |
3.317 |
| gf |
1.000 |
| gb |
-0.998 |
| 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 |
03:59:21.79 |
+38:19:37.8 |
HIP 18628 |
21.79 |
| 2026-07-29 12:00 |
03:59:22.57 |
+38:19:44.9 |
HIP 18628 |
21.93 |
| 2026-07-30 00:00 |
03:59:23.33 |
+38:19:52.1 |
HIP 18628 |
22.06 |
| 2026-07-30 12:00 |
03:59:24.08 |
+38:19:59.2 |
HIP 18628 |
22.19 |
| 2026-07-31 00:00 |
03:59:24.81 |
+38:20:06.4 |
HIP 18628 |
22.32 |
| 2026-07-31 12:00 |
03:59:25.54 |
+38:20:13.5 |
HIP 18628 |
22.46 |
| 2026-08-01 00:00 |
03:59:26.25 |
+38:20:20.7 |
HIP 18628 |
22.59 |
| 2026-08-01 12:00 |
03:59:26.94 |
+38:20:27.8 |
HIP 18628 |
22.73 |
| 2026-08-02 00:00 |
03:59:27.63 |
+38:20:34.9 |
HIP 18628 |
22.86 |
| 2026-08-02 12:00 |
03:59:28.30 |
+38:20:42.0 |
HIP 18628 |
22.99 |
| 2026-08-03 00:00 |
03:59:28.95 |
+38:20:49.1 |
HIP 18628 |
23.13 |
| 2026-08-03 12:00 |
03:59:29.60 |
+38:20:56.2 |
HIP 18628 |
23.26 |
| 2026-08-04 00:00 |
03:59:30.23 |
+38:21:03.3 |
HIP 18628 |
23.40 |
| 2026-08-04 12:00 |
03:59:30.84 |
+38:21:10.3 |
HIP 18628 |
23.53 |
| 2026-08-05 00:00 |
03:59:31.44 |
+38:21:17.4 |
HIP 18628 |
23.67 |
| 2026-08-05 12:00 |
03:59:32.03 |
+38:21:24.4 |
HIP 18628 |
23.80 |
| 2026-08-06 00:00 |
03:59:32.61 |
+38:21:31.5 |
HIP 18628 |
23.93 |
| 2026-08-06 12:00 |
03:59:33.17 |
+38:21:38.5 |
HIP 18628 |
24.07 |
| 2026-08-07 00:00 |
03:59:33.71 |
+38:21:45.5 |
HIP 18628 |
24.20 |
| 2026-08-07 12:00 |
03:59:34.25 |
+38:21:52.5 |
HIP 18628 |
24.33 |
| 2026-08-08 00:00 |
03:59:34.76 |
+38:21:59.4 |
HIP 18628 |
24.46 |
| 2026-08-08 12:00 |
03:59:35.27 |
+38:22:06.4 |
HIP 18628 |
24.60 |
| 2026-08-09 00:00 |
03:59:35.76 |
+38:22:13.3 |
HIP 18628 |
24.73 |
| 2026-08-09 12:00 |
03:59:36.24 |
+38:22:20.3 |
HIP 18628 |
24.86 |
| 2026-08-10 00:00 |
03:59:36.70 |
+38:22:27.2 |
HIP 18628 |
24.99 |
| 2026-08-10 12:00 |
03:59:37.15 |
+38:22:34.1 |
HIP 18628 |
25.12 |
| 2026-08-11 00:00 |
03:59:37.58 |
+38:22:40.9 |
HIP 18628 |
25.25 |
| 2026-08-11 12:00 |
03:59:38.00 |
+38:22:47.8 |
HIP 18628 |
25.37 |
| 2026-08-12 00:00 |
03:59:38.40 |
+38:22:54.6 |
HIP 18628 |
25.50 |
| 2026-08-12 12:00 |
03:59:38.79 |
+38:23:01.4 |
HIP 18628 |
25.63 |
| 2026-08-13 00:00 |
03:59:39.17 |
+38:23:08.2 |
HIP 18628 |
25.75 |
| 2026-08-13 12:00 |
03:59:39.53 |
+38:23:15.0 |
HIP 18628 |
25.88 |
| 2026-08-14 00:00 |
03:59:39.88 |
+38:23:21.7 |
HIP 18657 |
25.86 |
| 2026-08-14 12:00 |
03:59:40.21 |
+38:23:28.5 |
HIP 18657 |
25.75 |
| 2026-08-15 00:00 |
03:59:40.53 |
+38:23:35.2 |
HIP 18657 |
25.64 |
| 2026-08-15 12:00 |
03:59:40.83 |
+38:23:41.9 |
HIP 18657 |
25.53 |
| 2026-08-16 00:00 |
03:59:41.12 |
+38:23:48.5 |
HIP 18657 |
25.42 |
| 2026-08-16 12:00 |
03:59:41.39 |
+38:23:55.2 |
HIP 18657 |
25.31 |
| 2026-08-17 00:00 |
03:59:41.65 |
+38:24:01.8 |
HIP 18657 |
25.20 |
| 2026-08-17 12:00 |
03:59:41.90 |
+38:24:08.4 |
HIP 18657 |
25.09 |
| 2026-08-18 00:00 |
03:59:42.13 |
+38:24:14.9 |
HIP 18657 |
24.98 |
| 2026-08-18 12:00 |
03:59:42.34 |
+38:24:21.5 |
HIP 18657 |
24.87 |
| 2026-08-19 00:00 |
03:59:42.54 |
+38:24:28.0 |
HIP 18657 |
24.76 |