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C/1984 K1 (Shoemaker)

메타데이터

항목 값
Designation C/1984 K1 (Shoemaker)
Type C
Perihelion (tp_cal, UTC) 1985-09-04T14:13:51.985920Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:29:31Z
Obs used 176
NEO -
M1 5.600
K1 8.250
PC 0.030
Osculating 궤도요소
항목 값
Epoch (epoch_cal, TDB) 1986-02-09.0000000
e 1.00072275
q (au) 2.696507
a (au) -3730.894921
i (deg) 116.665429
Ω (om, deg) 49.690085
ω (w, deg) 235.469697
M (ma, deg) 0.000681

밝기

C/1984 K1 (Shoemaker) · Magnitude (Full range)

산란 + 전체 선형

$$ M_a = (7.496 + 3.683\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목 값
H0 7.496
n 3.683
gf 1.000
gb -0.707
k 0.800
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

잔차 (구간 선형)

$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$

시작일 (UTC) 끝 (UTC) a b
1984-05-27 1985-06-23 +0.0410 -0.115
1985-10-13 1992-01-04 -0.7996 +1.135

log10 r = log10(태양거리/AU), Δ = 지구거리(AU)

천체력

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-02-03 00:00 01:16:09.73 +38:31:58.6 HIP 5874 9.04
2026-02-03 12:00 01:16:10.53 +38:31:49.5 HIP 5874 9.14
2026-02-04 00:00 01:16:11.35 +38:31:40.6 HIP 5874 9.26
2026-02-04 12:00 01:16:12.19 +38:31:31.8 HIP 5874 9.38
2026-02-05 00:00 01:16:13.05 +38:31:23.1 HIP 5981 9.19
2026-02-05 12:00 01:16:13.93 +38:31:14.6 HIP 5981 8.98
2026-02-06 00:00 01:16:14.82 +38:31:06.2 HIP 5981 8.77
2026-02-06 12:00 01:16:15.73 +38:30:57.9 HIP 5981 8.55
2026-02-07 00:00 01:16:16.65 +38:30:49.7 HIP 5981 8.33
2026-02-07 12:00 01:16:17.60 +38:30:41.7 HIP 5981 8.11
2026-02-08 00:00 01:16:18.56 +38:30:33.8 HIP 5981 7.89
2026-02-08 12:00 01:16:19.54 +38:30:26.0 HIP 5981 7.67
2026-02-09 00:00 01:16:20.53 +38:30:18.4 HIP 5981 7.44
2026-02-09 12:00 01:16:21.54 +38:30:10.9 HIP 5981 7.21
2026-02-10 00:00 01:16:22.57 +38:30:03.5 HIP 5981 6.98
2026-02-10 12:00 01:16:23.61 +38:29:56.3 HIP 5981 6.75
2026-02-11 00:00 01:16:24.67 +38:29:49.2 HIP 5981 6.52
2026-02-11 12:00 01:16:25.75 +38:29:42.2 HIP 5981 6.28
2026-02-12 00:00 01:16:26.84 +38:29:35.4 HIP 5981 6.04
2026-02-12 12:00 01:16:27.95 +38:29:28.7 HIP 5981 5.80
2026-02-13 00:00 01:16:29.07 +38:29:22.1 HIP 5981 5.56
2026-02-13 12:00 01:16:30.21 +38:29:15.7 HIP 5981 5.32
2026-02-14 00:00 01:16:31.37 +38:29:09.4 HIP 5981 5.07
2026-02-14 12:00 01:16:32.54 +38:29:03.2 HIP 5981 4.82
2026-02-15 00:00 01:16:33.73 +38:28:57.2 HIP 5981 4.57
2026-02-15 12:00 01:16:34.94 +38:28:51.3 HIP 5981 4.32
2026-02-16 00:00 01:16:36.15 +38:28:45.6 HIP 5981 4.07
2026-02-16 12:00 01:16:37.39 +38:28:40.0 HIP 5981 3.81
2026-02-17 00:00 01:16:38.64 +38:28:34.5 HIP 5981 3.55
2026-02-17 12:00 01:16:39.90 +38:28:29.2 HIP 5981 3.29
2026-02-18 00:00 01:16:41.18 +38:28:24.0 HIP 5981 3.03
2026-02-18 12:00 01:16:42.48 +38:28:19.0 HIP 5981 2.76
2026-02-19 00:00 01:16:43.79 +38:28:14.0 HIP 5981 2.50
2026-02-19 12:00 01:16:45.11 +38:28:09.3 HIP 5981 2.23
2026-02-20 00:00 01:16:46.45 +38:28:04.7 HIP 5981 1.96
2026-02-20 12:00 01:16:47.80 +38:28:00.2 HIP 5981 1.69
2026-02-21 00:00 01:16:49.17 +38:27:55.8 HIP 5981 1.41
2026-02-21 12:00 01:16:50.55 +38:27:51.7 HIP 5981 1.14
2026-02-22 00:00 01:16:51.95 +38:27:47.6 HIP 5981 0.87
2026-02-22 12:00 01:16:53.36 +38:27:43.7 HIP 5981 0.60
2026-02-23 00:00 01:16:54.78 +38:27:39.9 HIP 5981 0.35
2026-02-23 12:00 01:16:56.22 +38:27:36.3 HIP 5982 0.17
2026-02-24 00:00 01:16:57.67 +38:27:32.8 HIP 5982 0.15