메타데이터
| 항목 |
값 |
| Designation |
C/1995 Q2 (Hartley-Drinkwater) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1995-08-02T17:27:23.549760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
22.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1995-09-06.0000000 |
| e |
0.96649288 |
| q (au) |
1.889143 |
| a (au) |
56.380355 |
| i (deg) |
168.007513 |
| Ω (om, deg) |
300.750783 |
| ω (w, deg) |
314.000279 |
| M (ma, deg) |
0.079792 |
밝기
산란 + 전체 선형
$$
M_a = (13.337 + 4.533\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.337 |
| n |
4.533 |
| gf |
0.995 |
| gb |
-0.557 |
| k |
0.869 |
| δ90 |
9.997 |
| 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) |
| 2026-03-26 00:00 |
12:31:21.72 |
+08:31:00.4 |
HIP 61094 |
17.76 |
| 2026-03-26 12:00 |
12:31:19.27 |
+08:31:16.1 |
HIP 61094 |
17.46 |
| 2026-03-27 00:00 |
12:31:16.81 |
+08:31:31.7 |
HIP 61094 |
17.18 |
| 2026-03-27 12:00 |
12:31:14.35 |
+08:31:47.3 |
HIP 61094 |
16.93 |
| 2026-03-28 00:00 |
12:31:11.90 |
+08:32:02.8 |
HIP 61094 |
16.70 |
| 2026-03-28 12:00 |
12:31:09.44 |
+08:32:18.2 |
HIP 61094 |
16.49 |
| 2026-03-29 00:00 |
12:31:06.98 |
+08:32:33.6 |
HIP 61094 |
16.31 |
| 2026-03-29 12:00 |
12:31:04.52 |
+08:32:48.9 |
HIP 61094 |
16.16 |
| 2026-03-30 00:00 |
12:31:02.07 |
+08:33:04.1 |
HIP 61094 |
16.03 |
| 2026-03-30 12:00 |
12:30:59.61 |
+08:33:19.3 |
HIP 61094 |
15.93 |
| 2026-03-31 00:00 |
12:30:57.15 |
+08:33:34.4 |
HIP 61094 |
15.85 |
| 2026-03-31 12:00 |
12:30:54.70 |
+08:33:49.4 |
HIP 61094 |
15.81 |
| 2026-04-01 00:00 |
12:30:52.24 |
+08:34:04.3 |
HIP 61094 |
15.79 |
| 2026-04-01 12:00 |
12:30:49.79 |
+08:34:19.2 |
HIP 61094 |
15.80 |
| 2026-04-02 00:00 |
12:30:47.34 |
+08:34:33.9 |
HIP 61094 |
15.84 |
| 2026-04-02 12:00 |
12:30:44.89 |
+08:34:48.7 |
HIP 61094 |
15.91 |
| 2026-04-03 00:00 |
12:30:42.44 |
+08:35:03.3 |
HIP 61094 |
16.00 |
| 2026-04-03 12:00 |
12:30:39.99 |
+08:35:17.8 |
HIP 61094 |
16.12 |
| 2026-04-04 00:00 |
12:30:37.54 |
+08:35:32.3 |
HIP 61094 |
16.27 |
| 2026-04-04 12:00 |
12:30:35.10 |
+08:35:46.7 |
HIP 61094 |
16.44 |
| 2026-04-05 00:00 |
12:30:32.66 |
+08:36:01.0 |
HIP 61094 |
16.64 |
| 2026-04-05 12:00 |
12:30:30.22 |
+08:36:15.2 |
HIP 61094 |
16.86 |
| 2026-04-06 00:00 |
12:30:27.78 |
+08:36:29.4 |
HIP 61094 |
17.10 |
| 2026-04-06 12:00 |
12:30:25.35 |
+08:36:43.4 |
HIP 61094 |
17.36 |
| 2026-04-07 00:00 |
12:30:22.92 |
+08:36:57.4 |
HIP 61094 |
17.65 |
| 2026-04-07 12:00 |
12:30:20.49 |
+08:37:11.3 |
HIP 61094 |
17.95 |
| 2026-04-08 00:00 |
12:30:18.07 |
+08:37:25.1 |
HIP 61094 |
18.27 |
| 2026-04-08 12:00 |
12:30:15.65 |
+08:37:38.8 |
HIP 61094 |
18.61 |
| 2026-04-09 00:00 |
12:30:13.23 |
+08:37:52.4 |
HIP 61094 |
18.96 |
| 2026-04-09 12:00 |
12:30:10.82 |
+08:38:05.9 |
HIP 61094 |
19.33 |
| 2026-04-10 00:00 |
12:30:08.41 |
+08:38:19.3 |
HIP 61094 |
19.71 |
| 2026-04-10 12:00 |
12:30:06.01 |
+08:38:32.7 |
HIP 61094 |
20.10 |
| 2026-04-11 00:00 |
12:30:03.61 |
+08:38:45.9 |
HIP 61094 |
20.51 |
| 2026-04-11 12:00 |
12:30:01.22 |
+08:38:59.1 |
HIP 60910 |
20.60 |
| 2026-04-12 00:00 |
12:29:58.83 |
+08:39:12.1 |
HIP 60910 |
20.31 |
| 2026-04-12 12:00 |
12:29:56.44 |
+08:39:25.1 |
HIP 60910 |
20.02 |
| 2026-04-13 00:00 |
12:29:54.06 |
+08:39:37.9 |
HIP 60910 |
19.75 |
| 2026-04-13 12:00 |
12:29:51.69 |
+08:39:50.7 |
HIP 60910 |
19.50 |
| 2026-04-14 00:00 |
12:29:49.32 |
+08:40:03.4 |
HIP 60910 |
19.26 |
| 2026-04-14 12:00 |
12:29:46.95 |
+08:40:15.9 |
HIP 60910 |
19.04 |
| 2026-04-15 00:00 |
12:29:44.60 |
+08:40:28.4 |
HIP 60910 |
18.84 |
| 2026-04-15 12:00 |
12:29:42.25 |
+08:40:40.7 |
HIP 60910 |
18.66 |
| 2026-04-16 00:00 |
12:29:39.90 |
+08:40:53.0 |
HIP 60910 |
18.49 |